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Comment Search results for posted by Federico Kereki :
List Comments Posted in the Last:
Difficulty: 4 of 5Under Getting Maps In 2080 (in Just Math)
Posted on 2007-08-17 (4 Comments)
Some Thoughts re: solution by Federico Kereki (2007-08-17 18:44:22)
Difficulty: 3 of 5Under Compendium, Book And Novel (in Just Math)
Posted on 2007-08-11 (5 Comments)
Solution An approximation method by Federico Kereki (2007-08-11 22:33:22)
Difficulty: 3 of 5Under On a Grid (in Logic)
Posted on 2007-08-08 (6 Comments)
Question What happens with a 6x6? by Federico Kereki (2007-08-09 09:13:04)
Difficulty: 3 of 5Under 4,4,4,4.... (in Sequences)
Posted on 2007-07-31 (8 Comments)
Some Thoughts re: Let me spell it out for you (Solution) by Federico Kereki (2007-07-31 16:28:13)
Difficulty: 3 of 5Under Subtract The Cubics, Get Product (in Just Math)
Posted on 2007-07-22 (5 Comments)
re: solution by Federico Kereki (2007-07-23 00:19:46)
Difficulty: 2 of 5Under Subtract From Sum And Multiply, Get Number(s) (in Just Math)
Posted on 2007-07-19 (3 Comments)
Solution Quick by Federico Kereki (2007-07-20 08:17:25)
Difficulty: 3 of 5Under Greaterdoku (in General)
Posted on 2007-07-15 (12 Comments)
Thanks! by Federico Kereki (2007-07-16 02:05:21)
Difficulty: 3 of 5Under Miracles? - Nah - Mirickles! (in Word Problems)
Posted on 2007-07-14 (8 Comments)
re: Too Hard (Part Spoiler) by Federico Kereki (2007-07-14 17:06:22)
Difficulty: 2 of 5Under A Reciprocal And Square Problem (in Just Math)
Posted on 2007-07-10 (7 Comments)
Solution Analytical solution by Federico Kereki (2007-07-10 11:38:51)
Difficulty: 3 of 5Under A Game of Tennis (in Probability)
Posted on 2007-07-05 (6 Comments)
Some Thoughts First question by Federico Kereki (2007-07-05 14:05:12)
Difficulty: 3 of 5Under Sum Three Factorials, Get Exponent (in Numbers)
Posted on 2007-07-03 (8 Comments)
Some Thoughts Just for starters by Federico Kereki (2007-07-03 10:26:39)
Difficulty: 4 of 5Under Multiply Together, Get Cubic (in Numbers)
Posted on 2007-06-21 (8 Comments)
Some Thoughts Some steps? by Federico Kereki (2007-06-21 11:17:35)
Difficulty: 3 of 5Under Face up Poker (in Games)
Posted on 2007-06-04 (8 Comments)
Some Thoughts A possibility for the second part by Federico Kereki (2007-06-04 13:51:44)
Difficulty: 2 of 5Under Mean Sequence (in Sequences)
Posted on 2007-05-23 (7 Comments)
Solution Recurrence solution by Federico Kereki (2007-05-23 12:14:52)
Difficulty: 3 of 5Under Subtle Summed Squares (in Numbers)
Posted on 2007-05-18 (6 Comments)
Some Thoughts re(2): Not so fast! by Federico Kereki (2007-05-21 22:15:49)
Difficulty: 3 of 5Under Phidius (in Numbers)
Posted on 2007-05-11 (4 Comments)
Solution re: Solution ... Spoiler by Federico Kereki (2007-05-11 12:23:59)
Difficulty: 3 of 5Under The blurred note 2 (in Liars and Knights)
Posted on 2007-04-19 (5 Comments)
Solution Solution by Federico Kereki (2007-04-20 00:09:21)
Difficulty: 3 of 5Under Alternating sextet (in Sequences)
Posted on 2007-03-30 (6 Comments)
re: Brute force and luck by Federico Kereki (2007-03-31 11:45:55)
Solution A Linux way by Federico Kereki (2007-03-30 19:28:12)
Difficulty: 3 of 5Under Surprising Sudden Square (in Numbers)
Posted on 2007-03-24 (10 Comments)
Some Thoughts A stop? by Federico Kereki (2007-03-24 21:59:14)
Difficulty: 3 of 5Under How many oranges? (in Numbers)
Posted on 2007-03-22 (6 Comments)
Solution re: Some rotten here... by Federico Kereki (2007-03-22 18:05:38)
Some Thoughts Some rotten here... by Federico Kereki (2007-03-22 15:19:59)
Difficulty: 3 of 5Under Polynomial Puzzle (in Just Math)
Posted on 2007-03-16 (7 Comments)
Some Thoughts re(2): If there's only one answer... by Federico Kereki (2007-03-16 17:02:34)
Solution If there's only one answer... by Federico Kereki (2007-03-16 13:10:06)
Difficulty: 3 of 5Under Four Coins and Three Weighings (in Weights and Scales)
Posted on 2007-03-08 (10 Comments)
Solution Information theory way by Federico Kereki (2007-03-08 16:09:28)
Difficulty: 3 of 5Under Another deadman in Knavesville (in Liars and Knights)
Posted on 2007-03-08 (14 Comments)
Solution Quick by Federico Kereki (2007-03-08 11:30:07)
Difficulty: 3 of 5Under Summing Digits (in Numbers)
Posted on 2007-02-26 (4 Comments)
Some Thoughts First part by Federico Kereki (2007-02-27 06:52:52)
Difficulty: 4 of 5Under Funky Fibonacci Fractions (in Numbers)
Posted on 2007-02-22 (5 Comments)
Solution Proof by Federico Kereki (2007-02-23 08:34:44)
Difficulty: 3 of 5Under Another 2007 Problem (in Numbers)
Posted on 2007-02-19 (7 Comments)
Some Thoughts Obvious ones by Federico Kereki (2007-02-19 16:22:58)
Difficulty: 5 of 5Under Pages and Squires (in Liars and Knights)
Posted on 2007-02-13 (7 Comments)
Some Thoughts re: Great Puzzle! by Federico Kereki (2007-02-14 09:36:19)
Difficulty: 3 of 5Under Prison Challenge (in Just Math)
Posted on 2007-02-05 (7 Comments)
Some Thoughts re: solution -- an objection by Federico Kereki (2007-02-05 15:25:14)
Difficulty: 3 of 5Under A Chamsonel Problem (in Liars and Knights)
Posted on 2007-01-30 (7 Comments)
Solution A short proof by Federico Kereki (2007-01-31 09:55:26)
Difficulty: 4 of 5Under Function Challenge (in Just Math)
Posted on 2007-01-27 (2 Comments)
Some Thoughts A feasibility check by Federico Kereki (2007-01-27 11:14:00)
Difficulty: 2 of 5Under Numbered Cube (in Numbers)
Posted on 2007-01-26 (3 Comments)
Solution Quick solution by Federico Kereki (2007-01-26 20:17:01)
Difficulty: 2 of 5Under Allen's Ambivalent Approximation (in Probability)
Posted on 2007-01-11 (5 Comments)
Solution Some math by Federico Kereki (2007-01-11 11:36:51)
Difficulty: 3 of 5Under Bananas III (in Numbers)
Posted on 2006-12-22 (4 Comments)
Some Thoughts re: generalization by Federico Kereki (2006-12-23 08:27:59)
Difficulty: 2 of 5Under Six hundred coins (in Probability)
Posted on 2006-12-22 (12 Comments)
Some Thoughts re: I might think you cheated. by Federico Kereki (2006-12-22 14:13:46)
Difficulty: 3 of 5Under Floor function and primes (in Numbers)
Posted on 2006-12-09 (5 Comments)
Solution An old fashioned solution by Federico Kereki (2006-12-09 23:13:57)
Difficulty: 3 of 5Under Duplicate Digit Determination (in Numbers)
Posted on 2006-12-03 (6 Comments)
Solution An easy way out by Federico Kereki (2006-12-03 17:51:41)
Difficulty: 3 of 5Under Sum crazy dice (in Probability)
Posted on 2006-11-30 (8 Comments)
Solution First one by Federico Kereki (2006-11-30 12:59:09)
Difficulty: 3 of 5Under Perpetual Primes Production? (in Numbers)
Posted on 2006-11-29 (12 Comments)
Some Thoughts re: I would take that bet by Federico Kereki (2006-11-29 21:50:30)
Some Thoughts A bet by Federico Kereki (2006-11-29 18:27:15)
Difficulty: 4 of 5Under ABCD (in Logic)
Posted on 2006-11-26 (32 Comments)
Solution If you got it, flaunt it! by Federico Kereki (2006-11-26 12:52:13)
Difficulty: 3 of 5Under A square with a circle with a point (in Geometry)
Posted on 2006-11-25 (14 Comments)
re: Circular Argument by Federico Kereki (2006-11-26 08:39:34)
Difficulty: 3 of 5Under Geometric calculator (in Geometry)
Posted on 2006-11-24 (3 Comments)
Solution Answers by Federico Kereki (2006-11-24 19:48:04)
Difficulty: 3 of 5Under Queen Square II (in Algorithms)
Posted on 2006-11-22 (4 Comments)
Some Thoughts re: Speedy check by Federico Kereki (2006-11-22 14:04:26)
Some Thoughts Speedy check by Federico Kereki (2006-11-22 13:58:48)
Difficulty: 3 of 5Under Arbitrary Adventures Analysis (in General)
Posted on 2006-11-20 (9 Comments)
Some Thoughts re(2): Program needed . . . by Federico Kereki (2006-11-20 14:51:24)
Some Thoughts re: Solution -- disagree by Federico Kereki (2006-11-20 10:55:07)
Difficulty: 5 of 5Under Circular map (in Geometry)
Posted on 2006-11-15 (29 Comments)
Some Thoughts Sticking by my guns by Federico Kereki (2006-11-15 18:02:49)
Difficulty: 4 of 5Under Logidoku (in Logic)
Posted on 2006-11-06 (15 Comments)
Solution Cooked? by Federico Kereki (2006-11-06 16:20:05)
Difficulty: 2 of 5Under Mister Resistor (in Science)
Posted on 2006-11-03 (6 Comments)
Some Thoughts re: Solution by Federico Kereki (2006-11-03 11:01:12)
Difficulty: 2 of 5Under Favorable Numbers (in Numbers)
Posted on 2006-11-02 (4 Comments)
Solution Inductive answer by Federico Kereki (2006-11-02 12:43:16)
Difficulty: 3 of 5Under No rows (in Games)
Posted on 2006-10-24 (17 Comments)
Some Thoughts re(2): What about...+ most of a solution by Federico Kereki (2006-10-24 13:27:28)
Difficulty: 3 of 5Under Letter ratios (in Word Problems)
Posted on 2006-10-20 (6 Comments)
My 4 to 1 by Federico Kereki (2006-10-20 10:03:03)
Difficulty: 2 of 5Under Shrink needed (in Algorithms)
Posted on 2006-10-18 (26 Comments)
Some Thoughts re(3): No impossibility -- doubt it by Federico Kereki (2006-10-23 08:17:13)
Some Thoughts re(3): Any compressor will do -- doubt it by Federico Kereki (2006-10-23 08:15:47)
Solution A tricky way out by Federico Kereki (2006-10-21 14:34:11)
Some Thoughts re: Any compressor will do -- doubt it by Federico Kereki (2006-10-21 07:27:27)
Some Thoughts re: No impossibility -- doubt it by Federico Kereki (2006-10-20 22:23:09)
Some Thoughts re: Ideas by Federico Kereki (2006-10-19 14:03:29)
Some Thoughts re: Impossibility? by Federico Kereki (2006-10-18 10:11:31)
Difficulty: 4 of 5Under Three Periodical Questions (in Numbers)
Posted on 2006-10-16 (4 Comments)
Hints/Tips re: What is 'pure'? (and part 1 & 2)) by Federico Kereki (2006-10-16 11:47:34)
Difficulty: 2 of 5Under Integer Roots (in Just Math)
Posted on 2006-10-14 (5 Comments)
Some Thoughts re(2): Some thoughts by Federico Kereki (2006-10-15 12:42:03)
Some Thoughts Some thoughts by Federico Kereki (2006-10-14 16:52:52)
Difficulty: 3 of 5Under Oddwins (in Games)
Posted on 2006-10-03 (11 Comments)
Some Thoughts re: Trial and error by Federico Kereki (2006-10-03 20:27:23)
Solution Almost mystic solution by Federico Kereki (2006-10-03 20:24:41)
re: Solution (spoiler) - PROBLEM by Federico Kereki (2006-10-03 16:47:39)
re: Solution (spoiler) - PROBLEM by Federico Kereki (2006-10-03 16:47:34)
Difficulty: 2 of 5Under Those infinite small steps (in Just Math)
Posted on 2006-10-03 (8 Comments)
Solution The classic one by Federico Kereki (2006-10-03 16:50:25)
Difficulty: 2 of 5Under A horse of a different color (in Liars and Knights)
Posted on 2006-09-26 (20 Comments)
re: Solution (spoiler) by Federico Kereki (2006-09-26 12:40:24)
Difficulty: 3 of 5Under Repeating decimals (in Numbers)
Posted on 2006-09-25 (11 Comments)
Some Thoughts re(2): General solution by Federico Kereki (2006-09-26 11:34:15)
Solution General solution by Federico Kereki (2006-09-26 10:58:27)
Difficulty: 3 of 5Under Numbers of letters of numbers of letters of... (in Sequences)
Posted on 2006-09-10 (15 Comments)
Solution German by Federico Kereki (2006-09-10 22:40:42)
Solution Portuguese by Federico Kereki (2006-09-10 14:33:39)
Solution French by Federico Kereki (2006-09-10 14:31:41)
Solution Spanish by Federico Kereki (2006-09-10 14:30:50)
Difficulty: 4 of 5Under Evil powers (in Numbers)
Posted on 2006-08-31 (8 Comments)
Solution Answers by Federico Kereki (2006-08-31 13:29:26)
Difficulty: 2 of 5Under Identical Opposites (in Word Problems)
Posted on 2006-08-29 (5 Comments)
re: Thanks by Federico Kereki (2006-08-30 14:55:48)
Difficulty: 2 of 5Under Five Circle Division (in Geometry)
Posted on 2006-08-26 (15 Comments)
Solution Infinite solutions by Federico Kereki (2006-08-26 20:13:54)
Difficulty: 3 of 5Under Are all complex numbers real? (in Paradoxes)
Posted on 2006-08-24 (14 Comments)
Some Thoughts re: The General Problem by Federico Kereki (2006-08-24 16:27:36)
Difficulty: 2 of 5Under A FIRST and SECOND Problem (in Numbers)
Posted on 2006-08-22 (5 Comments)
Some Thoughts re: An idea, with no computer by Federico Kereki (2006-08-25 08:58:41)
Difficulty: 4 of 5Under Summing or Multiplying (in Numbers)
Posted on 2006-08-21 (20 Comments)
Some Thoughts re: Peculiars vs. Primes by Federico Kereki (2006-08-22 17:33:41)
Some Thoughts re: With a program by Federico Kereki (2006-08-21 19:08:01)
Some Thoughts Comments by Federico Kereki (2006-08-21 12:36:44)
Difficulty: 1 of 5Under Millenium problem (in Numbers)
Posted on 2006-08-21 (14 Comments)
Solution Some left over by Federico Kereki (2006-08-21 09:21:07)
Difficulty: 2 of 5Under An Identity Problem (in Liars and Knights)
Posted on 2006-08-17 (11 Comments)
Solution Quick by Federico Kereki (2006-08-17 18:00:08)
Difficulty: 3 of 5Under So how small is it then? (in Numbers)
Posted on 2006-08-09 (14 Comments)
Some Thoughts re: How about we try this a different way. by Federico Kereki (2006-08-09 18:30:50)
Difficulty: 3 of 5Under Sign of a Permutation (in Algorithms)
Posted on 2006-08-05 (11 Comments)
Solution Simple by Federico Kereki (2006-08-05 19:09:26)
Difficulty: 3 of 5Under Tricky Ten Digit Number (in Numbers)
Posted on 2006-07-31 (10 Comments)
re(3): computer program by Federico Kereki (2006-07-31 22:16:06)
Some Thoughts re: computer program by Federico Kereki (2006-07-31 15:47:04)
Difficulty: 3 of 5Under A Real Solution Puzzle (in Just Math)
Posted on 2006-07-30 (5 Comments)
Some Thoughts An easy one by Federico Kereki (2006-07-30 16:27:10)
Difficulty: 3 of 5Under A 2006 Problem (in Numbers)
Posted on 2006-07-27 (8 Comments)
re: Howto by Federico Kereki (2006-07-29 11:49:36)
re: CORRECTION by Federico Kereki (2006-07-29 11:48:22)
Difficulty: 4 of 5Under Various Valleys, More Mountains (in Shapes)
Posted on 2006-07-26 (7 Comments)
Hints/Tips Have you ever... by Federico Kereki (2006-07-27 08:08:38)
Difficulty: 3 of 5Under Find All Numbers (in Just Math)
Posted on 2006-07-25 (7 Comments)
Solution No computer used by Federico Kereki (2006-07-25 13:31:09)
Some Thoughts re: Solution (using computer) by Federico Kereki (2006-07-25 13:26:35)
Difficulty: 3 of 5Under Cube first, or square second (in Numbers)
Posted on 2006-07-22 (7 Comments)
A bet winning solution by Federico Kereki (2006-07-22 13:27:55)
Difficulty: 1 of 5Under aerodynamics (in Riddles)
Posted on 2006-07-20 (14 Comments)
Some Thoughts Searching by Federico Kereki (2006-07-20 10:53:52)
Difficulty: 4 of 5Under Hats and alligators (in Logic)
Posted on 2006-07-15 (19 Comments)
Solution re: Solution by Federico Kereki (2006-07-15 19:17:37)
Difficulty: 5 of 5Under A Coquin Problem (in Liars and Knights)
Posted on 2006-07-11 (11 Comments)
Solution Solution by Federico Kereki (2006-07-11 21:50:10)
Difficulty: 3 of 5Under Which is Which (in Weights and Scales)
Posted on 2006-07-07 (15 Comments)
Some Thoughts Trivial boundary by Federico Kereki (2006-07-07 10:22:33)
Difficulty: 2 of 5Under Your soul mate? (in Riddles)
Posted on 2006-07-05 (8 Comments)
More thoughts by Federico Kereki (2006-07-05 14:04:04)
Difficulty: 3 of 5Under Calling all pythagoreans (in Geometry)
Posted on 2006-07-03 (7 Comments)
Some Thoughts re: Somekind of solution by Federico Kereki (2006-07-03 14:26:46)
Difficulty: 4 of 5Under Play fair in Europe! (in Cryptography)
Posted on 2006-06-29 (12 Comments)
re: QM WK XL MA! by Federico Kereki (2006-07-01 08:24:19)
Some Thoughts To Jyqm by Federico Kereki (2006-06-29 21:43:58)
Some Thoughts re(3): QK NS UR BH by Federico Kereki (2006-06-29 19:54:01)
Hints/Tips re: QK NS UR BH by Federico Kereki (2006-06-29 16:49:36)
Difficulty: 5 of 5Under The Domino Theory (in Science)
Posted on 2006-06-28 (8 Comments)
re: first part of part 2 by Federico Kereki (2006-06-29 15:03:00)
Some Thoughts First part by Federico Kereki (2006-06-28 16:15:08)
Difficulty: 4 of 5Under Gardener's Woe (in Just Math)
Posted on 2006-06-24 (26 Comments)
Some Thoughts re(2): Some thinking by Federico Kereki (2006-06-24 14:45:52)
Difficulty: 2 of 5Under Fiction Novel And Science Book Problem (in Just Math)
Posted on 2006-06-20 (5 Comments)
Some Thoughts re: No brutes needed by Federico Kereki (2006-06-20 18:22:43)
Difficulty: 2 of 5Under Simplify the expression (in Just Math)
Posted on 2006-06-16 (8 Comments)
Solution Short by Federico Kereki (2006-06-16 10:28:49)
Difficulty: 2 of 5Under Arcanum (in Riddles)
Posted on 2006-06-15 (16 Comments)
Some Thoughts Is this it? by Federico Kereki (2006-06-16 21:10:41)
Difficulty: 3 of 5Under log the log (in Just Math)
Posted on 2006-06-11 (5 Comments)
Solution Starting from the end by Federico Kereki (2006-06-12 15:45:10)
Difficulty: 3 of 5Under Countries of the World (in Word Problems)
Posted on 2006-06-09 (6 Comments)
Personally... by Federico Kereki (2006-06-10 09:47:46)
Difficulty: 4 of 5Under Needed: Number Nineteen! (in General)
Posted on 2006-06-01 (13 Comments)
Some Thoughts re: aha? by Federico Kereki (2006-06-02 08:25:52)
Difficulty: 4 of 5Under Another Quintic Problem (in Just Math)
Posted on 2006-05-31 (5 Comments)
Some Thoughts re: Who needs p and q? (SPOILER) by Federico Kereki (2006-05-31 14:51:12)
Difficulty: 3 of 5Under Polynomial # 1 (in Just Math)
Posted on 2006-05-26 (7 Comments)
Some Thoughts re: Solution (spoiler) by Federico Kereki (2006-05-26 15:54:21)
Question An extra question by Federico Kereki (2006-05-26 10:02:38)
Difficulty: 4 of 5Under The Paradox of Relativity (in Science)
Posted on 2006-05-24 (9 Comments)
re(2): Some thoughts by Federico Kereki (2006-05-28 20:37:50)
Difficulty: 2 of 5Under Mutually disagreeing queens. (in General)
Posted on 2006-05-19 (5 Comments)
Solution Another solution by Federico Kereki (2006-05-19 11:03:03)
Difficulty: 2 of 5Under How many Integers? (in Just Math)
Posted on 2006-05-18 (9 Comments)
Solution Quick by Federico Kereki (2006-05-18 10:00:58)
Difficulty: 2 of 5Under Cubes in a tin (in Shapes)
Posted on 2006-05-15 (23 Comments)
Some Thoughts Dissenting opinion by Federico Kereki (2006-05-15 12:50:55)
Difficulty: 2 of 5Under Either / Or (in Numbers)
Posted on 2006-05-13 (17 Comments)
Some Thoughts re: The answer -- not so by Federico Kereki (2006-05-15 21:12:20)
Difficulty: 3 of 5Under Bit by Bit (in Cryptography)
Posted on 2006-05-12 (5 Comments)
Some Thoughts Random thoughts by Federico Kereki (2006-05-12 19:28:35)
Difficulty: 3 of 5Under Squares in a cross (in General)
Posted on 2006-05-10 (5 Comments)
re: Solution by Federico Kereki (2006-05-10 09:08:52)
Difficulty: 3 of 5Under Look Ma, no integrals! (in Calculus)
Posted on 2006-05-02 (14 Comments)
Some Thoughts re: Observations and maybe solution by Federico Kereki (2006-05-02 15:41:30)
Difficulty: 3 of 5Under A Composite Determination Problem (in Just Math)
Posted on 2006-04-23 (14 Comments)
Solution re: A first stab at the solution by Federico Kereki (2006-04-23 19:10:55)
Difficulty: 3 of 5Under Classical Rules 1 (in Numbers)
Posted on 2006-04-17 (10 Comments)
Some Thoughts Copyright! by Federico Kereki (2006-04-18 09:03:43)
Some Thoughts re(2): Full solution by Federico Kereki (2006-04-17 20:07:04)
Solution Full solution by Federico Kereki (2006-04-17 14:59:53)
Difficulty: 2 of 5Under RIP (in General)
Posted on 2006-04-13 (6 Comments)
Solution Short by Federico Kereki (2006-04-13 10:50:16)
Difficulty: 2 of 5Under Austin Ruth (in Sequences)
Posted on 2006-04-08 (8 Comments)
Some Thoughts At the 12th place... by Federico Kereki (2006-04-08 23:32:17)
Difficulty: 2 of 5Under Don't drink and run (in Tricks)
Posted on 2006-04-03 (5 Comments)
Solution Algebraically by Federico Kereki (2006-04-03 09:32:24)
Difficulty: 2 of 5Under How Many Pairs (in Just Math)
Posted on 2006-03-14 (13 Comments)
Some Thoughts re: Simple solution by Federico Kereki (2006-03-16 14:34:34)
Difficulty: 3 of 5Under what a lovely View... (in Cryptography)
Posted on 2006-03-12 (24 Comments)
Methinks... by Federico Kereki (2006-03-12 08:33:58)
Difficulty: 3 of 5Under The Gardener and the Cook (in Tricks)
Posted on 2006-03-01 (29 Comments)
Solution Two possibilities by Federico Kereki (2006-03-01 15:33:28)
Difficulty: 3 of 5Under Splitting shapes (in Shapes)
Posted on 2006-02-16 (9 Comments)
Hints/Tips Parts 1 & 4: Three congruent parts by Federico Kereki (2006-02-16 12:03:32)
Difficulty: 3 of 5Under Spotty editing (in Probability)
Posted on 2006-02-14 (13 Comments)
Some Thoughts Actually useful by Federico Kereki (2006-02-14 15:54:58)
Difficulty: 2 of 5Under Only briefly continuous (in Calculus)
Posted on 2005-12-15 (11 Comments)
Solution Another solution by Federico Kereki (2005-12-15 09:44:28)
Difficulty: 4 of 5Under Perpendicular Area (in Geometry)
Posted on 2005-12-08 (2 Comments)
Some Thoughts Particular case by Federico Kereki (2005-12-08 19:58:14)
Difficulty: 3 of 5Under Perpendiculars Picking Probability (in Probability)
Posted on 2005-11-24 (5 Comments)
Any triangle by Federico Kereki (2005-11-24 11:00:29)
Difficulty: 3 of 5Under Challenging Chess Championship (in Games)
Posted on 2005-11-16 (13 Comments)
Some Thoughts re: One solution -- something wrong by Federico Kereki (2005-11-16 20:20:38)
Difficulty: 2 of 5Under Once a liar, always a liar (in Logic)
Posted on 2005-11-02 (26 Comments)
Solution re(2): Psychological answer by Federico Kereki (2005-11-02 09:00:16)
Difficulty: 3 of 5Under The undiscovered numbers (in Logic)
Posted on 2005-10-29 (32 Comments)
Some Thoughts "Knowing" vs "Guessing" by Federico Kereki (2005-10-30 10:08:06)
Difficulty: 2 of 5Under An infinite chessboard (in Just Math)
Posted on 2005-10-28 (26 Comments)
Some Thoughts XOR symbol by Federico Kereki (2005-10-28 17:53:47)
Difficulty: 2 of 5Under what am I? (in Riddles)
Posted on 2005-10-21 (44 Comments)
Solution More earthly possibilities by Federico Kereki (2005-10-21 11:23:53)
Difficulty: 3 of 5Under Isosceles Right Triangles (in Geometry)
Posted on 2005-10-19 (10 Comments)
Solution Vectorial solution, plus new theorems by Federico Kereki (2005-10-19 19:59:27)
Difficulty: 2 of 5Under Words on the rocks, please (in Word Problems)
Posted on 2005-10-17 (5 Comments)
Some Thoughts re: got a few of them by Federico Kereki (2005-10-17 21:16:43)
Difficulty: 3 of 5Under The 3-digit Number (in Just Math)
Posted on 2005-10-16 (18 Comments)
Solution No computers! by Federico Kereki (2005-10-17 06:07:29)
Difficulty: 3 of 5Under Prisoner's Dilemma (in Games)
Posted on 2005-10-06 (11 Comments)
Some Thoughts My idea by Federico Kereki (2005-10-06 22:34:12)
Difficulty: 2 of 5Under Another one of those niiice looong sequences (in Sequences)
Posted on 2005-09-29 (5 Comments)
Some Thoughts re: do not get ooo by Federico Kereki (2005-10-03 18:41:33)
Difficulty: 2 of 5Under Closest to pi (in Just Math)
Posted on 2005-09-25 (25 Comments)
Some Thoughts re: this one beats them all : less than 10^-9 by Federico Kereki (2005-09-28 19:54:27)
Solution My best, by hand by Federico Kereki (2005-09-26 17:40:56)
Difficulty: 2 of 5Under Shorten and halve (in Word Problems)
Posted on 2005-09-21 (32 Comments)
Some Thoughts re: probably not correct by Federico Kereki (2005-09-22 17:56:15)
Difficulty: 3 of 5Under Maximum Triangle (in Calculus)
Posted on 2005-09-19 (4 Comments)
Solution Algebraically by Federico Kereki (2005-09-19 20:41:35)
Difficulty: 3 of 5Under Three Spheres (in Geometry)
Posted on 2005-09-14 (5 Comments)
Some Thoughts No calculus answer, for the first part by Federico Kereki (2005-09-15 02:39:15)
Difficulty: 4 of 5Under One or Two Fake Coins (in Weights and Scales)
Posted on 2005-09-13 (4 Comments)
Some Thoughts A confidence vote by Federico Kereki (2005-09-14 02:36:26)
Difficulty: 3 of 5Under Odd people (in Liars and Knights)
Posted on 2005-09-12 (13 Comments)
Some Thoughts Lisa's point by Federico Kereki (2005-09-12 15:51:27)
Solution Analysis by Federico Kereki (2005-09-12 15:30:19)
Difficulty: 1 of 5Under what a riddle!! (in Riddles)
Posted on 2005-09-11 (55 Comments)
Solution Answer by Federico Kereki (2005-09-13 02:33:14)
Difficulty: 3 of 5Under ABSENT TONE (in Numbers)
Posted on 2005-09-02 (18 Comments)
re(2): What is a TONE? by Federico Kereki (2005-09-03 01:51:43)
Difficulty: 3 of 5Under Sorta pythagoric... (in Numbers)
Posted on 2005-09-01 (16 Comments)
re: Not other small ones by Federico Kereki (2005-09-01 19:26:43)
Difficulty: 2 of 5Under Celsius x Fahrenheit (in Just Math)
Posted on 2005-08-31 (9 Comments)
Solution Without a computer by Federico Kereki (2005-09-01 00:25:30)
Difficulty: 3 of 5Under A quite even partition (in Numbers)
Posted on 2005-08-28 (18 Comments)
re: The Odd-Sided Squares Principle by Federico Kereki (2005-08-31 03:21:40)
Difficulty: 2 of 5Under The folly of war part 1: Knights (in Probability)
Posted on 2005-08-23 (23 Comments)
Some Thoughts re: Expected answer by Federico Kereki (2005-08-23 19:46:44)
Solution Expected answer by Federico Kereki (2005-08-23 12:59:06)
Difficulty: 3 of 5Under Devilish Difference (in Numbers)
Posted on 2005-08-22 (6 Comments)
Some Thoughts re(2): Solution by Federico Kereki (2005-08-23 19:53:04)
Solution Solution by Federico Kereki (2005-08-23 02:25:12)
Difficulty: 1 of 5Under Needle in a Haystack (in General)
Posted on 2005-08-17 (13 Comments)
Solution Two needles found by Federico Kereki (2005-08-17 15:27:10)
Difficulty: 4 of 5Under All/Any different? (in Numbers)
Posted on 2005-08-16 (26 Comments)
Hints/Tips A hint by Federico Kereki (2005-08-16 23:11:35)
Difficulty: 3 of 5Under Just Jauntily Jousting (in Liars and Knights)
Posted on 2005-08-15 (8 Comments)
Hints/Tips What he knew by Federico Kereki (2005-08-15 23:06:38)
Difficulty: 2 of 5Under The murderer in the Hotel (in Logic)
Posted on 2005-08-11 (59 Comments)
Solution Simple solution by Federico Kereki (2005-08-11 13:15:33)
Difficulty: 3 of 5Under Pair Playing Probability (in Probability)
Posted on 2005-08-02 (31 Comments)
Some Thoughts re: my new answer -- still wrong by Federico Kereki (2005-08-03 20:57:51)
Some Thoughts re: My Answer by Federico Kereki (2005-08-03 04:07:48)
Some Thoughts re(3): I undestood right? - no, WRONG. by Federico Kereki (2005-08-02 20:09:12)
Difficulty: 3 of 5Under Siblings Should Share Secret Safely (in General)
Posted on 2005-07-17 (18 Comments)
Some Thoughts re: Buried... DOESN'T WORK by Federico Kereki (2005-07-18 00:10:42)
Difficulty: 1 of 5Under Ask for help (in Liars and Knights)
Posted on 2005-07-05 (41 Comments)
Discussion by Federico Kereki (2005-07-05 23:37:09)
Difficulty: 3 of 5Under Complicated Cars Conundrum (in Logic)
Posted on 2005-07-03 (7 Comments)
Solution Reasoned out in two paragraphs by Federico Kereki (2005-07-04 01:47:03)
Some Thoughts re: Solution by Federico Kereki (2005-07-03 13:50:29)
Difficulty: 1 of 5Under Yeah, yeah, yeah -- aye? (in General)
Posted on 2005-06-29 (7 Comments)
re(3): Answer by Federico Kereki (2005-06-29 14:38:32)
Difficulty: 4 of 5Under Twelve Coins and a Broken Scale (in Weights and Scales)
Posted on 2005-06-24 (8 Comments)
re: Solution, I think. by Federico Kereki (2005-06-26 01:34:23)
Difficulty: 3 of 5Under A classic game (in Numbers)
Posted on 2005-06-22 (9 Comments)
Some Thoughts re: Answer by Federico Kereki (2005-06-22 19:42:21)
Difficulty: 2 of 5Under Marbles Bonanza II (in Just Math)
Posted on 2005-06-21 (33 Comments)
Counterintuitive by Federico Kereki (2005-06-21 20:08:35)
Difficulty: 3 of 5Under Similar Sides Sought (in Geometry)
Posted on 2005-06-20 (6 Comments)
Some Thoughts Almost there... by Federico Kereki (2005-06-24 22:44:56)
Difficulty: 5 of 5Under Elemental game (in Probability)
Posted on 2005-06-16 (17 Comments)
Solution Both solutions by Federico Kereki (2005-06-20 15:56:44)
Expected result by Federico Kereki (2005-06-17 02:29:42)
Difficulty: 2 of 5Under Strange divisibility (in Just Math)
Posted on 2005-05-25 (27 Comments)
re(4): Bigger numbers (sqrt) by Federico Kereki (2005-05-25 20:28:39)
Difficulty: 3 of 5Under Monkeys and Coconuts w/unknown variables (in Numbers)
Posted on 2005-05-08 (10 Comments)
Some Thoughts re: close, but not quite... by Federico Kereki (2005-05-09 03:09:57)
Difficulty: 2 of 5Under Extend, at the end (in Sequences)
Posted on 2005-05-04 (9 Comments)
Some Thoughts re: solution with explanation by Federico Kereki (2005-05-04 16:00:06)
Difficulty: 3 of 5Under Is there a six-letter word? (in Tricks)
Posted on 2005-05-03 (21 Comments)
re: huh?? by Federico Kereki (2005-05-04 16:05:03)
Solution A solution by Federico Kereki (2005-05-04 13:03:18)
Difficulty: 3 of 5Under Calculators at the ready.... (in Sequences)
Posted on 2005-04-30 (15 Comments)
Solution re: Solution (without spoiler) by Federico Kereki (2005-04-30 19:07:38)
Difficulty: 4 of 5Under Just find two! (in Geometry)
Posted on 2005-04-27 (25 Comments)
Hints/Tips My method by Federico Kereki (2005-05-10 19:49:55)
Non-iterative solution by Federico Kereki (2005-05-01 14:41:21)
Difficulty: 3 of 5Under 1000th digit (in Numbers)
Posted on 2005-04-26 (30 Comments)
Solution Solution by Federico Kereki (2005-04-26 23:29:31)
Difficulty: 3 of 5Under Unequally Unintegrally Yoked (in Calculus)
Posted on 2005-04-24 (8 Comments)
Some Thoughts re: Solution & Spoiler by Federico Kereki (2005-04-24 21:09:22)
Difficulty: 2 of 5Under Go for short! (in Numbers)
Posted on 2005-04-19 (8 Comments)
Solution Another way by Federico Kereki (2005-04-19 12:43:14)
Difficulty: 3 of 5Under Graduation Day (in Liars and Knights)
Posted on 2005-04-18 (5 Comments)
Some Thoughts First thoughts... by Federico Kereki (2005-04-18 17:43:53)
Difficulty: 4 of 5Under The Midville Muddlers (in Logic)
Posted on 2005-04-15 (22 Comments)
Some Thoughts The false statement by Federico Kereki (2005-04-15 20:26:58)
Difficulty: 4 of 5Under Guess a number (in Algorithms)
Posted on 2005-04-14 (19 Comments)
Some Thoughts Close... by Federico Kereki (2005-04-14 20:48:15)
Difficulty: 1 of 5Under It is a riddle (in Riddles)
Posted on 2005-04-13 (86 Comments)
Solution? by Federico Kereki (2005-04-13 18:25:21)
Difficulty: 3 of 5Under It is infinite if it isn't? (in Paradoxes)
Posted on 2005-04-12 (35 Comments)
Some Thoughts Further thoughts by Federico Kereki (2005-04-12 22:36:22)
Some Thoughts Possible paradox by Federico Kereki (2005-04-12 20:47:31)
Difficulty: 2 of 5Under triple doubles (in Word Problems)
Posted on 2005-04-12 (14 Comments)
Some Thoughts re: Answer 2 -- doesn't work by Federico Kereki (2005-04-12 16:34:39)
Difficulty: 2 of 5Under Maximum impossible score (in Games)
Posted on 2005-04-10 (3 Comments)
Some Thoughts Generalizing by Federico Kereki (2005-04-10 19:28:59)
Difficulty: 3 of 5Under Roll the Die Higher (in Probability)
Posted on 2005-04-07 (13 Comments)
re(2): Solution w/o expl. and a question by Federico Kereki (2005-04-07 20:54:37)
Some Thoughts re: Solution w/o expl. and a question by Federico Kereki (2005-04-07 20:47:49)
Some Thoughts Theory (maybe solution) by Federico Kereki (2005-04-07 19:00:47)
Difficulty: 2 of 5Under Black ants marching (in Riddles)
Posted on 2005-03-31 (23 Comments)
Hints/Tips re: One more thing... by Federico Kereki (2005-04-03 15:42:45)
Hints/Tips Another hint (and still no spoilers) by Federico Kereki (2005-03-31 20:54:33)
Difficulty: 3 of 5Under Two false coins (in Weights and Scales)
Posted on 2005-03-25 (11 Comments)
Some Thoughts Existential doubt by Federico Kereki (2005-03-27 22:29:30)
Difficulty: 3 of 5Under Two to the Three = Three to the Two? (in Numbers)
Posted on 2005-03-22 (8 Comments)
Solution An awk solution by Federico Kereki (2005-03-23 15:36:21)
Difficulty: 3 of 5Under Wonderful Water Works (in Weights and Scales)
Posted on 2005-03-19 (5 Comments)
Solution re: Solution by Federico Kereki (2005-03-20 16:06:32)
Some Thoughts Solution by Federico Kereki (2005-03-19 15:24:37)
Difficulty: 3 of 5Under Power inequality (in Just Math)
Posted on 2005-03-15 (18 Comments)
Solution Half a solution by Federico Kereki (2005-03-16 01:35:33)
Difficulty: 3 of 5Under Fibonacci Fractions (in Just Math)
Posted on 2005-03-09 (17 Comments)
Solution Explained solution by Federico Kereki (2005-03-09 21:12:57)
Difficulty: 3 of 5Under Different Dot Domains Division (in Shapes)
Posted on 2005-03-08 (4 Comments)
Solution Reasoned solution by Federico Kereki (2005-03-09 12:48:46)
Difficulty: 3 of 5Under Knight vs King and Mines (in Games)
Posted on 2005-03-07 (15 Comments)
re: Are the mines permanent? by Federico Kereki (2005-03-07 19:31:08)
re: Making a fence: Solution? by Federico Kereki (2005-03-07 19:27:02)
Difficulty: 3 of 5Under Broken Hypotenuse (in Geometry)
Posted on 2005-02-28 (10 Comments)
Solution re: A possible solution by Federico Kereki (2005-03-02 10:46:28)
Difficulty: 3 of 5Under Hat Exchange (in Algorithms)
Posted on 2005-02-24 (8 Comments)
Some Thoughts Maximum by Federico Kereki (2005-02-24 15:34:05)
Difficulty: 4 of 5Under Biased Coins (in Just Math)
Posted on 2005-02-17 (9 Comments)
Some Thoughts re: Simple solution by Federico Kereki (2005-02-18 13:27:34)
Difficulty: 4 of 5Under Connect The Dots (in Geometry)
Posted on 2005-02-06 (14 Comments)
Solution Short solution by Federico Kereki (2005-02-07 19:21:59)
Difficulty: 5 of 5Under Function(Function()) Finding (in Calculus)
Posted on 2005-02-02 (12 Comments)
Some Thoughts re: a function for F(x), for G(x) by Federico Kereki (2005-02-03 12:03:48)
Some Thoughts re: a function for g(x) by Federico Kereki (2005-02-03 12:01:56)
Difficulty: 4 of 5Under Whadduzitdo? (in Algorithms)
Posted on 2005-01-14 (9 Comments)
Solution Recursive solution by Federico Kereki (2005-01-14 17:33:10)
Difficulty: 2 of 5Under Falling beer bubbles (in Science)
Posted on 2005-01-12 (9 Comments)
Some Thoughts Another theory by Federico Kereki (2005-01-12 15:25:35)
Difficulty: 1 of 5Under Inaugural (in Word Problems)
Posted on 2005-01-07 (12 Comments)
Some Thoughts re: Occam's Razor by Federico Kereki (2005-01-07 17:44:06)
Difficulty: 3 of 5Under Prime divisors (in Just Math)
Posted on 2005-01-04 (11 Comments)
Solution Short program by Federico Kereki (2005-01-04 17:19:47)
Difficulty: 3 of 5Under Four Fours Fancy Formula! (in Just Math)
Posted on 2004-12-24 (6 Comments)
Some Thoughts re: heuristic solution by Federico Kereki (2004-12-29 13:23:27)
Difficulty: 3 of 5Under Hark! Who's Traveling? (in Famous Riddles)
Posted on 2004-12-21 (20 Comments)
Solution Solution by Federico Kereki (2004-12-23 17:18:13)
Some Thoughts re(3): What was I thinking about ? by Federico Kereki (2004-12-21 16:39:53)
Difficulty: 3 of 5Under Rational Result? Ridiculous! (in Numbers)
Posted on 2004-12-20 (19 Comments)
Solution Simple solution by Federico Kereki (2004-12-20 18:14:48)
Some Thoughts re: My solution by Federico Kereki (2004-12-20 18:12:37)
Difficulty: 2 of 5Under Guess my Number (in Logic)
Posted on 2004-12-20 (32 Comments)
Solution Possible solution by Federico Kereki (2004-12-20 11:39:55)
Difficulty: 2 of 5Under Formal Reasoning (in Logic)
Posted on 2004-12-15 (60 Comments)
re: Solution by Federico Kereki (2004-12-15 17:08:10)
Some Thoughts re: Is there a catch ? by Federico Kereki (2004-12-15 15:23:50)
Difficulty: 4 of 5Under The sum of a sequence (in Just Math)
Posted on 2004-12-14 (10 Comments)
Solution Without calculus by Federico Kereki (2004-12-15 11:22:23)
Difficulty: 2 of 5Under Three Words (in Word Problems)
Posted on 2004-12-13 (4 Comments)
Some Thoughts Psychological hint by Federico Kereki (2004-12-13 15:11:16)
Difficulty: 3 of 5Under I think this is a good riddle, but hey, everyone's a critic (in Riddles)
Posted on 2004-11-18 (70 Comments)
Some Thoughts re: my criticism (& solution, too) by Federico Kereki (2004-11-18 17:23:39)
Difficulty: 2 of 5Under Ten Five-Letter Words (in Cryptography)
Posted on 2004-11-18 (5 Comments)
Some Thoughts re(2): Using the web by Federico Kereki (2004-11-19 16:58:52)
Solution Using the web by Federico Kereki (2004-11-19 12:32:05)
Difficulty: 2 of 5Under The Logician's Birthday (in Logic)
Posted on 2004-11-17 (60 Comments)
Some Thoughts re(2): Another Aproach: by Federico Kereki (2004-11-19 17:05:00)
Difficulty: 3 of 5Under Insane Chess King (in Games)
Posted on 2004-11-16 (11 Comments)
Some Thoughts re: Solution by Federico Kereki (2004-11-19 17:02:15)
Some Thoughts Initial position by Federico Kereki (2004-11-16 09:10:59)
Difficulty: 4 of 5Under Kool Numbers (in Numbers)
Posted on 2004-11-15 (10 Comments)
Some Thoughts First part by Federico Kereki (2004-11-15 13:48:02)
Difficulty: 3 of 5Under The Card Sorting Machine (in Algorithms)
Posted on 2004-11-12 (4 Comments)
Solution re: A less pure conjecture by Federico Kereki (2004-11-13 16:25:58)
Difficulty: 1 of 5Under I didn't do it. (in Liars and Knights)
Posted on 2004-11-04 (16 Comments)
Solution A simple way by Federico Kereki (2004-11-04 13:47:19)
Difficulty: 4 of 5Under Marble Game (in Probability)
Posted on 2004-11-01 (12 Comments)
Solution Fancier answer by Federico Kereki (2004-11-01 23:22:53)
Some Thoughts re(2): Fancy Shmancy Answer by Federico Kereki (2004-11-01 23:06:36)
Solution Fancy Answer by Federico Kereki (2004-11-01 15:17:34)
Difficulty: 4 of 5Under Square the Circle (in Geometry)
Posted on 2004-10-28 (8 Comments)
Some Thoughts Some thoughts by Federico Kereki (2004-10-28 18:56:10)
Difficulty: 3 of 5Under Triangular Coordinates (in Numbers)
Posted on 2004-10-26 (11 Comments)
re: What's a triangular number? by Federico Kereki (2004-10-26 17:08:13)
Difficulty: 3 of 5Under Select an Item (in Algorithms)
Posted on 2004-10-22 (13 Comments)
re(2): No Subject by Federico Kereki (2004-10-23 12:09:52)
Difficulty: 3 of 5Under What did Black play? (in Games)
Posted on 2004-10-18 (6 Comments)
Solution Short solution by Federico Kereki (2004-10-19 00:21:46)
Difficulty: 2 of 5Under The Sum of the Parts Is Less Than And More Than the Parts (in Numbers)
Posted on 2004-10-15 (11 Comments)
Solution Simple proof by Federico Kereki (2004-10-16 13:11:40)
Difficulty: 2 of 5Under Curious Cubic Calculation? (in Numbers)
Posted on 2004-10-13 (14 Comments)
Some Thoughts re: Algebraically by Federico Kereki (2004-10-14 01:00:24)
Difficulty: 3 of 5Under Five Sentences (in Logic)
Posted on 2004-10-12 (33 Comments)
re(2): Explanation by Federico Kereki (2004-10-12 20:12:48)
Solution Explanation by Federico Kereki (2004-10-12 18:37:34)
re: Solution by Federico Kereki (2004-10-12 16:45:40)
Difficulty: 3 of 5Under Candy Box (in Numbers)
Posted on 2004-10-08 (17 Comments)
Some Thoughts About 9 pieces by Federico Kereki (2004-10-08 16:57:16)
Some Thoughts Possibility by Federico Kereki (2004-10-08 12:35:56)
Difficulty: 3 of 5Under Tic-Tac-Toe Toss Tactics? (in Probability)
Posted on 2004-10-04 (10 Comments)
Solution re: Here's a try by Federico Kereki (2004-10-04 12:41:13)
Difficulty: 3 of 5Under Summing Squares Sequentially! (in Numbers)
Posted on 2004-10-01 (10 Comments)
re(3): Solution (slight correction) by Federico Kereki (2004-10-01 16:11:28)
re: Solution by Federico Kereki (2004-10-01 15:24:10)
Difficulty: 2 of 5Under Merit Review (in Sequences)
Posted on 2004-09-28 (6 Comments)
Some Thoughts re(3): Answer by Federico Kereki (2004-09-29 07:16:48)
Difficulty: 2 of 5Under At the Olympic Games (6) (in Logic)
Posted on 2004-09-27 (47 Comments)
re: Solution - with explanation - Can please some one verify approach? by Federico Kereki (2004-10-02 05:01:16)
Difficulty: 2 of 5Under Fill in the blanks. (in General)
Posted on 2004-09-22 (15 Comments)
Some Thoughts re: I didn't swink too long on this one (Solution) by Federico Kereki (2004-09-22 14:16:33)
Solution Archaically and technically speaking by Federico Kereki (2004-09-22 11:00:33)
Difficulty: 3 of 5Under Queen Square (in General)
Posted on 2004-09-20 (6 Comments)
Some Thoughts re: Clarification and Solution by Federico Kereki (2004-09-20 10:11:05)
Difficulty: 2 of 5Under Differential Cryptography (in Cryptography)
Posted on 2004-09-19 (7 Comments)
Some Thoughts re(2): Interesting by Federico Kereki (2004-09-20 07:09:38)
Difficulty: 3 of 5Under Nine kids (in Numbers)
Posted on 2004-09-09 (22 Comments)
Some Thoughts re: (Not a) Solution by Federico Kereki (2004-09-09 08:14:10)
Some Thoughts re: Valid Solution ? - I don't think so ! by Federico Kereki (2004-09-09 08:13:19)
Difficulty: 4 of 5Under Interesting Function (2) (in Just Math)
Posted on 2004-09-03 (6 Comments)
Solution Steps... by Federico Kereki (2004-09-03 13:12:18)
Difficulty: 2 of 5Under Another game of nim (in Games)
Posted on 2004-09-02 (10 Comments)
Solution Analysis by Federico Kereki (2004-09-02 19:34:22)
Difficulty: 3 of 5Under Quiz Results (in Logic)
Posted on 2004-09-02 (29 Comments)
Some Thoughts re(2): Tips to solve... Hit a Wall !!! by Federico Kereki (2004-09-02 08:33:37)
Difficulty: 3 of 5Under Pairs of Socks (in Probability)
Posted on 2004-09-01 (20 Comments)
re: Solution to part 1 by Federico Kereki (2004-09-01 20:57:30)
Difficulty: 3 of 5Under At the Olympic Games (5) (in Logic)
Posted on 2004-08-30 (20 Comments)
re: Solution by Federico Kereki (2004-09-07 14:41:51)
Two bronze medals? by Federico Kereki (2004-08-30 14:17:10)
Difficulty: 3 of 5Under Nice sum (in Just Math)
Posted on 2004-08-24 (13 Comments)
re: Solution by Federico Kereki (2004-08-28 21:24:33)
re: No Subject by Federico Kereki (2004-08-25 08:51:47)
Difficulty: 4 of 5Under Provably unprovable? (in Paradoxes)
Posted on 2004-08-22 (36 Comments)
re: From a pure logic standpoint... by Federico Kereki (2004-08-28 21:23:23)
Difficulty: 3 of 5Under Summing inverses (in Calculus)
Posted on 2004-08-19 (18 Comments)
re(4): Reason why sum of limits is not same as limit as sums by Federico Kereki (2004-08-20 07:51:46)
Difficulty: 2 of 5Under Two Crescents (in Geometry)
Posted on 2004-08-11 (15 Comments)
Solution Simple by Federico Kereki (2004-08-11 10:52:33)
Difficulty: 3 of 5Under Ten Words (2) (in Word Problems)
Posted on 2004-08-10 (13 Comments)
Some Thoughts re: Computer solution (exhaustive) by Federico Kereki (2004-08-10 13:37:45)
Difficulty: 4 of 5Under A Cute Dissection (in Geometry)
Posted on 2004-08-06 (6 Comments)
Some Thoughts You can't get six this way... by Federico Kereki (2004-08-08 08:49:53)
Some Thoughts re(2): Answer in seven by Federico Kereki (2004-08-06 22:04:55)
Difficulty: 3 of 5Under Another Couple (in General)
Posted on 2004-08-02 (9 Comments)
Some Thoughts One for the second by Federico Kereki (2004-08-02 07:56:19)
Difficulty: 4 of 5Under Logic and Stamps (in Logic)
Posted on 2004-07-31 (17 Comments)
Solution No thinking needed by Federico Kereki (2004-08-02 07:37:12)
Difficulty: 2 of 5Under How many 1s? (in Numbers)
Posted on 2004-07-26 (16 Comments)
Solution Solutions by Federico Kereki (2004-07-26 07:56:54)
Difficulty: 3 of 5Under Four Weights (in Weights and Scales)
Posted on 2004-07-25 (33 Comments)
Some Thoughts re: Why use a computer, common sense says by Federico Kereki (2004-07-25 21:05:16)
Difficulty: 3 of 5Under Different Sums (in Numbers)
Posted on 2004-07-22 (17 Comments)
Some Thoughts re: Curious second differences by Federico Kereki (2004-07-22 11:14:31)
Some Thoughts Curious second differences by Federico Kereki (2004-07-22 11:09:54)
re(2): With a little help from awk by Federico Kereki (2004-07-22 10:42:59)
Solution With a little help from awk by Federico Kereki (2004-07-22 10:00:34)
Difficulty: 4 of 5Under Indexed Puzzle (in Logic)
Posted on 2004-07-19 (22 Comments)
re(2): Solution by Federico Kereki (2004-07-21 13:56:48)
Solution Solution by Federico Kereki (2004-07-19 16:15:00)
Solution Solution by Federico Kereki (2004-07-19 16:14:07)
Difficulty: 2 of 5Under Power of Multiplication (in Numbers)
Posted on 2004-07-16 (6 Comments)
Some Thoughts General solution by Federico Kereki (2004-07-16 18:32:27)
Difficulty: 3 of 5Under Spirit of 76 with no products (in Numbers)
Posted on 2004-07-13 (3 Comments)
Solution My solution by Federico Kereki (2004-07-17 21:36:32)
Some Thoughts re: No Subject by Federico Kereki (2004-07-16 18:32:00)
Difficulty: 3 of 5Under Root Route (in Algorithms)
Posted on 2004-06-29 (7 Comments)
Solution Infinite methods by Federico Kereki (2004-07-02 14:00:14)
Solution Three related methods by Federico Kereki (2004-06-29 14:56:56)
Difficulty: 3 of 5Under Multiplying gets a square? (in Just Math)
Posted on 2004-06-26 (25 Comments)
re: No by Federico Kereki (2004-06-26 22:42:15)
Difficulty: 2 of 5Under A square (in Numbers)
Posted on 2004-06-25 (15 Comments)
Solution Just by hand by Federico Kereki (2004-06-25 16:39:30)
Difficulty: 2 of 5Under Maze Master (in Algorithms)
Posted on 2004-06-21 (12 Comments)
re: Oh rats ! by Federico Kereki (2004-06-21 15:28:13)
Solution Easiest solution by Federico Kereki (2004-06-21 14:18:49)
Difficulty: 3 of 5Under my house's number (in Numbers)
Posted on 2004-06-21 (32 Comments)
Some Thoughts Poor BASIC people... by Federico Kereki (2004-06-21 15:33:47)
Solution re: Solution by Federico Kereki (2004-06-21 08:56:15)
Difficulty: 2 of 5Under Handshakes (in Numbers)
Posted on 2004-06-14 (14 Comments)
Solution No brute force applied by Federico Kereki (2004-06-14 09:58:16)
Difficulty: 3 of 5Under Coin tossing (in Probability)
Posted on 2004-06-11 (25 Comments)
re(4): Markov chain solution - 2nd part by Federico Kereki (2004-06-15 10:43:45)
Difficulty: 3 of 5Under Problematic Pathways (in General)
Posted on 2004-06-08 (8 Comments)
Some Thoughts re: Full Solution by Federico Kereki (2004-06-08 08:43:25)
Difficulty: 2 of 5Under Geosynchronous Orbit (in Science)
Posted on 2004-06-05 (13 Comments)
Some Thoughts Impossibility by Federico Kereki (2004-06-05 11:40:07)
Difficulty: 2 of 5Under It's all in the roots! (in Just Math)
Posted on 2004-06-04 (8 Comments)
Solution re(2): Long answer - very interesting by Federico Kereki (2004-06-04 14:54:09)
Difficulty: 3 of 5Under Fill 'Er Up! (in General)
Posted on 2004-06-03 (12 Comments)
Some Thoughts Cryptic solution to Charlie's example by Federico Kereki (2004-06-04 08:45:01)
Solution Hints for a solution by Federico Kereki (2004-06-03 14:08:47)
Difficulty: 2 of 5Under Linked Rings (in Geometry)
Posted on 2004-05-29 (19 Comments)
Solution Some history by Federico Kereki (2004-05-29 18:53:20)
Difficulty: 2 of 5Under The Fur Dresser's Mistake (in Geometry)
Posted on 2004-05-28 (12 Comments)
Some Thoughts re(3): Half an answer by Federico Kereki (2004-05-28 14:41:42)
Some Thoughts re(2): Half an answer by Federico Kereki (2004-05-28 14:39:33)
Difficulty: 3 of 5Under Moving Day (in Calculus)
Posted on 2004-05-26 (31 Comments)
Solution SilverKnight's suggestion by Federico Kereki (2004-05-27 12:42:19)
Solution re: Full Solution by Federico Kereki (2004-05-26 15:00:20)
Some Thoughts re: pythagorean solution by Federico Kereki (2004-05-26 14:24:56)
Difficulty: 3 of 5Under The Last Diamond (in Probability)
Posted on 2004-05-25 (5 Comments)
Solution Working backwards by Federico Kereki (2004-05-25 10:45:08)
Difficulty: 2 of 5Under Symmetrical words (in Word Problems)
Posted on 2004-05-21 (17 Comments)
To K, or not to K? A "M" is a "W" is a "M"? by Federico Kereki (2004-05-21 12:52:47)
Difficulty: 2 of 5Under Dividing the Unknown (in Numbers)
Posted on 2004-05-20 (2 Comments)
Solution Solution by Federico Kereki (2004-05-20 12:28:00)
Difficulty: 1 of 5Under Block Tour (in Tricks)
Posted on 2004-05-19 (22 Comments)
Some Thoughts Possible by Federico Kereki (2004-05-19 08:55:00)
Difficulty: 3 of 5Under Speak for yourself! (in Liars and Knights)
Posted on 2004-05-14 (16 Comments)
Solution Another way by Federico Kereki (2004-05-14 19:05:31)
Difficulty: 4 of 5Under Chess anyone? (in Games)
Posted on 2004-05-13 (7 Comments)
Solution Hard by Federico Kereki (2004-05-14 09:05:01)
Difficulty: 1 of 5Under What am I? (in Riddles)
Posted on 2004-05-10 (51 Comments)
re: Answer by Federico Kereki (2004-05-10 18:53:47)
Difficulty: 3 of 5Under Who played first? (in Games)
Posted on 2004-05-07 (26 Comments)
Some Thoughts re: Sum it Up by Federico Kereki (2004-05-11 21:39:44)
Solution Starting to work... by Federico Kereki (2004-05-09 21:58:13)
re: iono by Federico Kereki (2004-05-09 21:49:04)
Difficulty: 2 of 5Under Particle Acceleration (in General)
Posted on 2004-05-06 (24 Comments)
re: Solution by Federico Kereki (2004-05-06 10:07:37)
Difficulty: 3 of 5Under Coin Collection (in Numbers)
Posted on 2004-05-04 (12 Comments)
re: The truth is out there by Federico Kereki (2004-05-04 12:22:04)
Difficulty: 3 of 5Under Strange pyramid (in Geometry)
Posted on 2004-05-03 (10 Comments)
re: Distinct integer edges by Federico Kereki (2004-05-04 12:20:44)
Difficulty: 3 of 5Under A Square Punishment (in Just Math)
Posted on 2004-05-02 (11 Comments)
Some Thoughts re: Solution by Federico Kereki (2004-05-03 06:58:21)
Solution Solution by Federico Kereki (2004-05-02 21:05:34)
Difficulty: 2 of 5Under Ship Shape (in General)
Posted on 2004-04-30 (7 Comments)
Solution Simple solution by Federico Kereki (2004-04-30 09:08:15)
Difficulty: 3 of 5Under Never prime! (in Numbers)
Posted on 2004-04-29 (10 Comments)
Some Thoughts re(2): Another thought - A simple solution for the 2nd part by Federico Kereki (2004-04-30 18:25:55)
Difficulty: 3 of 5Under Smudge Sludge (in Numbers)
Posted on 2004-04-28 (9 Comments)
Solution Reasoned solution by Federico Kereki (2004-04-28 17:58:06)
Difficulty: 1 of 5Under Cutting a cube (in Shapes)
Posted on 2004-04-28 (6 Comments)
Some Thoughts A variation by Federico Kereki (2004-04-28 10:27:40)
Difficulty: 5 of 5Under The Fifteen Steps (in Games)
Posted on 2004-04-26 (16 Comments)
re: The second part by Federico Kereki (2004-04-27 16:53:05)
Some Thoughts Half the answer by Federico Kereki (2004-04-27 06:49:31)
Difficulty: 2 of 5Under Lords and Ladies (in Logic)
Posted on 2004-04-25 (37 Comments)
Solution re: A far easier solution by Federico Kereki (2004-04-27 19:28:57)
Solution A far easier solution by Federico Kereki (2004-04-25 18:56:53)
Difficulty: 3 of 5Under 10 Sequences (in Sequences)
Posted on 2004-04-23 (9 Comments)
Some Thoughts Half an answer by Federico Kereki (2004-04-26 12:30:01)
Difficulty: 3 of 5Under Finding the maximum (in Algorithms)
Posted on 2004-04-21 (16 Comments)
Some Thoughts Alternate absolute value by Federico Kereki (2004-04-21 19:52:28)
Difficulty: 2 of 5Under Liar, Liar, Pants on Fire. (in Liars and Knights)
Posted on 2004-04-21 (11 Comments)
Some Thoughts re(2): Methodically by Federico Kereki (2004-04-21 11:18:30)
Solution Opinion by Federico Kereki (2004-04-21 09:31:57)
Difficulty: 2 of 5Under Rotating an array (in Algorithms)
Posted on 2004-04-19 (26 Comments)
re: 10 step method by Federico Kereki (2004-04-20 12:38:19)
Some Thoughts re: A possible way by Federico Kereki (2004-04-20 08:03:01)
Difficulty: 3 of 5Under Shortest Long Number (in Paradoxes)
Posted on 2004-04-15 (49 Comments)
Some Thoughts Berry's paradox isn't Berry's by Federico Kereki (2004-04-16 07:53:22)
Difficulty: 2 of 5Under What are you doing and where are you from? (in Word Problems)
Posted on 2004-04-14 (40 Comments)
re: well this is guess is the answer by Federico Kereki (2004-04-14 12:06:46)
re: And this nationality bitterly resents it too. by Federico Kereki (2004-04-14 10:42:25)
Solution Suggestions by Federico Kereki (2004-04-14 09:07:42)
Difficulty: 5 of 5Under e7(20) n2(17) (in Cryptography)
Posted on 2004-04-13 (31 Comments)
re(2): S7Y R8O O8N R8O E5M by Federico Kereki (2004-05-25 20:37:54)
Difficulty: 3 of 5Under The many sages (in Logic)
Posted on 2004-04-13 (24 Comments)
Some Thoughts re(3): Is there something funny about a black face ? by Federico Kereki (2004-04-13 13:45:20)
Some Thoughts re: Is there something funny about a black face ? by Federico Kereki (2004-04-13 12:39:30)
Some Thoughts re: Inductively by Federico Kereki (2004-04-13 10:51:23)
Difficulty: 2 of 5Under Ahnentafel Questions (I) (in General)
Posted on 2004-04-11 (15 Comments)
Some Thoughts re(2): Thanks heaps! by Federico Kereki (2004-04-13 09:11:32)
Some Thoughts Thanks heaps! by Federico Kereki (2004-04-12 10:10:04)
Solution re: Solution by Federico Kereki (2004-04-11 18:16:16)
Solution Solution by Federico Kereki (2004-04-11 11:41:52)
Difficulty: 2 of 5Under A flat ball? (in Geometry)
Posted on 2004-04-08 (24 Comments)
Some Thoughts So far, no cigar... by Federico Kereki (2004-04-09 18:51:00)
Difficulty: 2 of 5Under What are you saying? (in Cryptography)
Posted on 2004-04-05 (15 Comments)
Some Thoughts re: A backward solution by Federico Kereki (2004-04-12 15:55:55)
Difficulty: 3 of 5Under Disjointification (in Just Math)
Posted on 2004-04-04 (12 Comments)
Solution Solution by Federico Kereki (2004-04-04 15:30:49)
Difficulty: 3 of 5Under Who Stole the Tarts? (in Logic)
Posted on 2004-04-02 (17 Comments)
Solution re: Gryphon by Federico Kereki (2004-04-03 09:44:36)
Some Thoughts Remember... by Federico Kereki (2004-04-03 07:31:14)
Difficulty: 3 of 5Under At the World Series (in Probability)
Posted on 2004-04-01 (7 Comments)
re: More importantly... by Federico Kereki (2004-04-05 12:55:21)
Difficulty: 3 of 5Under new operations (in Just Math)
Posted on 2004-03-31 (14 Comments)
Some Thoughts re: Very poor by Federico Kereki (2004-04-01 12:29:02)
Difficulty: 3 of 5Under Squares Probability II (in Probability)
Posted on 2004-03-23 (15 Comments)
Some Thoughts Some thoughts by Federico Kereki (2004-03-23 15:12:39)
Difficulty: 2 of 5Under The similar sheet (in Geometry)
Posted on 2004-03-22 (18 Comments)
Solution Solution by Federico Kereki (2004-03-22 14:29:53)
Difficulty: 3 of 5Under Middle order (in Cryptography)
Posted on 2004-03-21 (11 Comments)
Solution Brief solution by Federico Kereki (2004-03-21 08:14:51)
Difficulty: 3 of 5Under Gamer say (in General)
Posted on 2004-03-18 (15 Comments)
Hints/Tips re: it is MORE challenging that I thought by Federico Kereki (2004-03-19 07:01:00)
Some Thoughts re: say it in any order by Federico Kereki (2004-03-18 14:54:27)
Difficulty: 1 of 5Under The magic Number (in Numbers)
Posted on 2004-03-17 (35 Comments)
Solution Solution by Federico Kereki (2004-03-17 08:46:07)
Difficulty: 3 of 5Under The Sliding Rooks (in Games)
Posted on 2004-03-08 (17 Comments)
Solution Ten moves by Federico Kereki (2004-03-08 15:17:50)
Difficulty: 3 of 5Under Next Numbers Please #2 (in Sequences)
Posted on 2004-03-08 (8 Comments)
Solution Solved by Federico Kereki (2004-03-08 09:07:45)
Difficulty: 3 of 5Under XX (in Logic)
Posted on 2004-03-07 (69 Comments)
No Subject by Federico Kereki (2004-03-08 07:55:38)
Difficulty: 3 of 5Under Packing 'em In (in Geometry)
Posted on 2004-03-02 (13 Comments)
Solution A generalization by Federico Kereki (2004-03-02 14:43:10)
Some Thoughts re(2): Possible solution by Federico Kereki (2004-03-02 14:41:02)
Solution Possible solution by Federico Kereki (2004-03-02 14:07:23)
Difficulty: 2 of 5Under Move the 3, Triple the number (in Numbers)
Posted on 2004-03-01 (17 Comments)
re(2): Standard solution by Federico Kereki (2004-03-04 11:37:01)
Solution Standard solution by Federico Kereki (2004-03-01 12:00:48)
Difficulty: 3 of 5Under Chess Board Switch (in General)
Posted on 2004-02-28 (14 Comments)
Some Thoughts re: A switch solution - maybe not the optimal one... by Federico Kereki (2004-03-02 07:03:49)
Difficulty: 4 of 5Under trigonometry and a triangle (in Just Math)
Posted on 2004-02-26 (14 Comments)
Some Thoughts re: solution by Federico Kereki (2004-02-27 06:43:35)
Difficulty: 3 of 5Under Unequally Yoked (in Numbers)
Posted on 2004-02-26 (12 Comments)
Some Thoughts re(2): Solution by Federico Kereki (2004-02-26 13:50:13)
Difficulty: 3 of 5Under Looking for n (in Numbers)
Posted on 2004-02-24 (12 Comments)
Hints/Tips Not a square by Federico Kereki (2004-02-24 15:20:46)
Difficulty: 2 of 5Under Power to the 2 (in Numbers)
Posted on 2004-02-20 (10 Comments)
Solution Sum by Federico Kereki (2004-02-20 08:47:53)
Difficulty: 4 of 5Under Trapped! (in Geometry)
Posted on 2004-02-19 (9 Comments)
Some Thoughts re: 'Within' includes 'on'? by Federico Kereki (2004-02-19 15:09:40)
Difficulty: 2 of 5Under Chickens, Pigs, and Cattle (in Just Math)
Posted on 2004-02-19 (24 Comments)
Solution Another way by Federico Kereki (2004-02-19 12:06:33)
Difficulty: 3 of 5Under The Black Hole (in Just Math)
Posted on 2004-02-18 (12 Comments)
Solution Solution by Federico Kereki (2004-02-19 08:18:28)
Difficulty: 2 of 5Under Quotational Quandary (in Logic)
Posted on 2004-02-16 (20 Comments)
Some Thoughts re(2): Just one pair by Federico Kereki (2004-02-16 13:42:51)
Solution Just one pair by Federico Kereki (2004-02-16 11:19:38)
Difficulty: 4 of 5Under West Side Story (in Numbers)
Posted on 2004-02-15 (7 Comments)
re: Initial numbers by Federico Kereki (2004-02-16 09:53:45)
Difficulty: 2 of 5Under who will marry the princess (in Riddles)
Posted on 2004-02-13 (95 Comments)
re(2): Solution by Federico Kereki (2004-02-13 12:58:55)
Solution Original answer by Federico Kereki (2004-02-13 11:25:01)
Difficulty: 4 of 5Under Triple Negative (in Logic)
Posted on 2004-02-12 (19 Comments)
Solution Classic solution by Federico Kereki (2004-02-12 14:36:18)
Difficulty: 3 of 5Under Don't Talk About Yourself (in General)
Posted on 2004-02-01 (14 Comments)
Some Thoughts Also not acceptable... by Federico Kereki (2004-02-02 08:59:13)
Difficulty: 4 of 5Under Through the Looking Glass (in Science)
Posted on 2004-01-29 (13 Comments)
Solution Answer by Federico Kereki (2004-01-30 07:14:38)
Difficulty: 4 of 5Under On Average (in Probability)
Posted on 2004-01-26 (11 Comments)
Solution Solution by Federico Kereki (2004-01-26 13:16:08)
Difficulty: 3 of 5Under Smallest Number (in Numbers)
Posted on 2004-01-25 (23 Comments)
Solution Standard solution by Federico Kereki (2004-01-26 11:41:02)
Difficulty: 4 of 5Under Three Bugs (in Shapes)
Posted on 2004-01-22 (16 Comments)
Some Thoughts re: solution by Federico Kereki (2004-01-23 08:59:40)
Difficulty: 3 of 5Under Extraterrestrial primes (in Numbers)
Posted on 2004-01-19 (7 Comments)
Solution Solution by Federico Kereki (2004-01-20 08:06:02)
Difficulty: 3 of 5Under Horse Race (in General)
Posted on 2004-01-19 (20 Comments)
Solution Short solution by Federico Kereki (2004-01-19 11:50:14)
Difficulty: 2 of 5Under Circle Square (in Geometry)
Posted on 2004-01-13 (15 Comments)
Some Thoughts re: Tessellation by Federico Kereki (2004-01-13 10:08:19)
Difficulty: 4 of 5Under Quadrilateral fun (in Geometry)
Posted on 2004-01-10 (6 Comments)
Solution Proof by Federico Kereki (2004-01-10 09:28:02)
Difficulty: 4 of 5Under A smart prisoner? (in Probability)
Posted on 2004-01-08 (22 Comments)
Some Thoughts Opinion by Federico Kereki (2004-01-08 11:56:48)
Difficulty: 2 of 5Under Swap (in Algorithms)
Posted on 2004-01-02 (11 Comments)
re: solution by Federico Kereki (2004-01-05 11:07:48)
Difficulty: 3 of 5Under Power - ful (in Just Math)
Posted on 2003-12-31 (11 Comments)
Some Thoughts Almost (50%) there by Federico Kereki (2003-12-31 09:58:58)
Difficulty: 3 of 5Under Quiz Quandary (in Probability)
Posted on 2003-12-26 (11 Comments)
Hints/Tips Markov chains by Federico Kereki (2003-12-27 01:12:39)
Difficulty: 3 of 5Under Lost my pointer 2 (in Algorithms)
Posted on 2003-12-18 (22 Comments)
re(3): Racing around by Federico Kereki (2003-12-19 11:50:31)
Solution re: Racing around by Federico Kereki (2003-12-18 21:12:07)
Difficulty: 4 of 5Under Proof of Anything (in Logic)
Posted on 2003-12-13 (44 Comments)
Solution The error by Federico Kereki (2003-12-14 19:35:24)
Difficulty: 2 of 5Under Squares and Cubes (in Numbers)
Posted on 2003-12-06 (21 Comments)
Solution The second solution? by Federico Kereki (2003-12-06 11:10:42)
Difficulty: 5 of 5Under PGKKW XIMAF TNEGA NFYGZ TMUIV (in Cryptography)
Posted on 2003-12-05 (20 Comments)
Some Thoughts re: hmm... by Federico Kereki (2003-12-05 20:40:37)
Difficulty: 3 of 5Under Piece o' Cake (in Geometry)
Posted on 2003-12-04 (22 Comments)
Solution Three cuts by Federico Kereki (2003-12-04 08:45:57)
Difficulty: 4 of 5Under Tricky Triangle (in Numbers)
Posted on 2003-12-03 (15 Comments)
re: wording change by Federico Kereki (2003-12-03 13:11:19)
Solution Full solution by Federico Kereki (2003-12-03 10:54:12)
Difficulty: 3 of 5Under Cake-Bake Contest (in Logic)
Posted on 2003-11-26 (19 Comments)
Solution Reasoned solution by Federico Kereki (2003-11-26 09:27:42)
Difficulty: 4 of 5Under The Powers that Be (in Just Math)
Posted on 2003-11-25 (19 Comments)
Some Thoughts Further elaboration by Federico Kereki (2003-11-25 13:23:55)
Question Short solution? by Federico Kereki (2003-11-25 13:23:15)
Difficulty: 2 of 5Under Calculation Mistake (in Just Math)
Posted on 2003-11-19 (8 Comments)
Solution Short by Federico Kereki (2003-11-19 11:58:44)
Difficulty: 2 of 5Under Quit While You're Ahead (in Probability)
Posted on 2003-11-10 (23 Comments)
Some Thoughts re(3): A footnote to this problem by Federico Kereki (2003-11-11 09:32:33)
Solution An easy solution by Federico Kereki (2003-11-10 12:46:22)
Difficulty: 3 of 5Under Foreign Puppy (in Just Math)
Posted on 2003-10-31 (8 Comments)
Solution Quick solution by Federico Kereki (2003-11-02 20:34:21)
Difficulty: 3 of 5Under Sum, Times, I Wonder.. (in Numbers)
Posted on 2003-10-24 (7 Comments)
Solution re: First Thoughts... by Federico Kereki (2003-10-24 11:53:23)
Difficulty: 3 of 5Under An Odd Pyramid (in Numbers)
Posted on 2003-10-14 (21 Comments)
Solution Triangular numbers everywhere by Federico Kereki (2003-10-15 09:20:23)
Difficulty: 1 of 5Under 00 Separate (in Just Math)
Posted on 2003-10-10 (13 Comments)
Solution Simple solution, with no words! by Federico Kereki (2003-10-11 10:44:15)
Difficulty: 4 of 5Under Strike a Chord (..Any Chord) (in Geometry)
Posted on 2003-10-09 (51 Comments)
Some Thoughts A needed fact by Federico Kereki (2003-10-09 22:01:41)
Difficulty: 3 of 5Under At the Olympic Games (1) (in Logic)
Posted on 2003-10-07 (20 Comments)
re(7):solution by Federico Kereki (2003-10-07 14:05:43)
Difficulty: 3 of 5Under Centrifugal Balance (in Shapes)
Posted on 2003-10-04 (12 Comments)
Solution Simple way by Federico Kereki (2003-10-05 21:15:18)
Difficulty: 2 of 5Under A Logic Accusation (in Logic)
Posted on 2003-10-01 (17 Comments)
Some Thoughts re(3): Solution by Federico Kereki (2003-10-05 21:29:15)
Difficulty: 3 of 5Under Towers of Hanoi (in Algorithms)
Posted on 2003-09-07 (21 Comments)
Solution A non-recursive solution by Federico Kereki (2003-09-08 13:18:33)
Difficulty: 3 of 5Under Soldiers and Sailors (in Liars and Knights)
Posted on 2003-09-01 (7 Comments)
Solution Short solution by Federico Kereki (2003-09-01 21:02:25)
Difficulty: 3 of 5Under Get it in Gear (in Numbers)
Posted on 2003-08-15 (7 Comments)
Some Thoughts A correction by Federico Kereki (2003-08-15 22:13:09)
Difficulty: 1 of 5Under The Aging Brothers (in Just Math)
Posted on 2003-08-14 (18 Comments)
Some Thoughts re: arrrggghhhh by Federico Kereki (2003-08-15 22:16:27)
Difficulty: 3 of 5Under Ducks in a row (in Sequences)
Posted on 2003-08-04 (7 Comments)
Hints/Tips Some hints by Federico Kereki (2003-08-04 10:00:49)
Difficulty: 3 of 5Under Is It or Is It Not ? (in Word Problems)
Posted on 2003-07-27 (15 Comments)
re: How about... by Federico Kereki (2003-07-27 06:58:54)
Some Thoughts A couple of obvious solutions... by Federico Kereki (2003-07-27 05:21:48)
Difficulty: 3 of 5Under Mike and the Bike (in Logic)
Posted on 2003-07-26 (42 Comments)
Solution Credits and debits by Federico Kereki (2003-07-26 13:47:02)
Difficulty: 3 of 5Under Reciprocal Equation #2 (in Just Math)
Posted on 2003-07-20 (15 Comments)
Some Thoughts re: A (partial?) solution by Federico Kereki (2003-07-21 08:07:14)
Some Thoughts A (partial?) solution by Federico Kereki (2003-07-21 07:59:33)
A (partial?) solution by Federico Kereki (2003-07-21 07:59:33)
Difficulty: 2 of 5Under Contest (in Logic)
Posted on 2003-07-15 (20 Comments)
Solution Short solution by Federico Kereki (2003-09-01 21:04:52)
Difficulty: 3 of 5Under A Word Sequence (in Sequences)
Posted on 2003-07-13 (12 Comments)
re: Wild Guess by Federico Kereki (2003-07-16 15:03:50)
Difficulty: 3 of 5Under Name Game (in Logic)
Posted on 2003-07-12 (28 Comments)
Some Thoughts No Subject by Federico Kereki (2003-07-14 15:17:13)
Difficulty: 2 of 5Under More knights,liars,and knaves (in Liars and Knights)
Posted on 2003-07-07 (19 Comments)
Solution? by Federico Kereki (2003-07-14 15:10:41)
Difficulty: 3 of 5Under More randomness! (in Algorithms)
Posted on 2003-06-30 (16 Comments)
Solution A binary solution by Federico Kereki (2003-07-14 15:49:01)
Difficulty: 4 of 5Under Knights being Liars? (in Liars and Knights)
Posted on 2003-06-10 (24 Comments)
Solution Solution by Federico Kereki (2003-10-27 13:03:57)
Difficulty: 2 of 5Under Horses On Hills (in Famous Riddles)
Posted on 2003-06-06 (28 Comments)
re: Hmm.. by Federico Kereki (2003-12-03 10:56:15)
Difficulty: 3 of 5Under The Strange Number (in Just Math)
Posted on 2003-05-29 (9 Comments)
Solution Solution by Federico Kereki (2003-10-17 13:02:58)
Difficulty: 3 of 5Under 9 random digits (in Algorithms)
Posted on 2003-05-02 (20 Comments)
Solution Solution by Federico Kereki (2003-07-14 15:35:14)
Difficulty: 1 of 5Under Drew and Mohammad come back (in Liars and Knights)
Posted on 2003-04-30 (27 Comments)
Sweet and short by Federico Kereki (2003-10-27 13:10:18)
Difficulty: 3 of 5Under True Or False - Part 1 (in Paradoxes)
Posted on 2003-04-24 (44 Comments)
Solution Oh, those quotes... by Federico Kereki (2003-10-12 14:19:14)
Difficulty: 4 of 5Under Zero - The Hero (in Numbers)
Posted on 2003-04-09 (15 Comments)
Solution Another way by Federico Kereki (2004-02-04 11:21:08)
Difficulty: 1 of 5Under Who is Guilty ? (in Liars and Knights)
Posted on 2003-02-27 (22 Comments)
Solution A simple solution by Federico Kereki (2003-10-11 10:42:32)
Difficulty: 2 of 5Under Lockers (in Numbers)
Posted on 2002-12-06 (10 Comments)
No Subject by Federico Kereki (2006-04-11 14:23:42)
Difficulty: 4 of 5Under Zero to 150 in 2003 (in Numbers)
Posted on 2002-11-29 (65 Comments)
Solution Easy solution by Federico Kereki (2003-11-19 15:26:05)
Difficulty: 4 of 5Under Coins on the round table (in Games)
Posted on 2002-09-08 (12 Comments)
Some Thoughts re(2): Win, starting anywhere by Federico Kereki (2003-11-28 23:33:22)
Solution Win, starting anywhere by Federico Kereki (2003-11-26 11:29:49)
Difficulty: 3 of 5Under Proof (in Just Math)
Posted on 2002-05-29 (44 Comments)
re(3): solution is wrong by Federico Kereki (2003-11-28 23:45:27)
Difficulty: 3 of 5Under The guilty demon (in Paradoxes)
Posted on 2002-05-29 (37 Comments)
Some Thoughts Impossible! by Federico Kereki (2003-12-02 12:43:22)
Difficulty: 3 of 5Under Colored hats (in Logic)
Posted on 2002-05-08 (11 Comments)
Simple & short by Federico Kereki (2003-10-27 12:46:50)
Some Thoughts re: hats by Federico Kereki (2003-10-27 12:43:54)
Difficulty: 4 of 5Under Population control (in Probability)
Posted on 2002-05-05 (14 Comments)
Solution Simple solution by Federico Kereki (2003-07-27 05:11:05)
Difficulty: 3 of 5Under Move the 2 - double the number (in Numbers)
Posted on 2002-04-19 (10 Comments)
Solution The continued fraction way by Federico Kereki (2003-12-04 09:49:37)
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