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Search results for problems posted by Charlie :
Difficulty: 3 of 5Indecisive Walk (in Numbers)
Posted on 2023-08-17 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Tropic Monuments (in Science)
Posted on 2023-07-10 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Ordinary Numbers (in Sequences) Rating: 5.00
Posted on 2023-06-09 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Sunshine on the Land Hemisphere (in Science)
Posted on 2023-06-06 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5OEIS in the NYT (in Sequences) Rating: 5.00
Posted on 2023-05-28 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Self Power to Googol (in Numbers) Rating: 5.00
Posted on 2023-03-27 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Albany and Tallahassee (in Science)
Posted on 2023-02-16 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Metapuzzle II (in Algorithms)
Posted on 2023-02-14 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5He Fooled Penn & Teller but ... (in Numbers) Rating: 2.00
Posted on 2022-12-07 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Special Words 2 (in Word Problems) Rating: 5.00
Posted on 2022-11-19 by Charlie (Solution Posted, 1 Comments)
Difficulty: 4 of 5Average Arctic Distance (in Probability)
Posted on 2022-10-21 by Charlie (Solution Posted, 8 Comments)
Difficulty: 3 of 56-digit number (in Numbers) Rating: 5.00
Posted on 2022-09-07 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Wordle in Two (in Word Problems) Rating: 5.00
Posted on 2022-08-25 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Latin Square Overlay (in Logic) Rating: 5.00
Posted on 2022-08-10 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Very Large Prime (in Numbers) Rating: 5.00
Posted on 2022-07-08 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Split the Square (in Numbers) Rating: 5.00
Posted on 2022-04-06 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Wordle Word Randomization (in Probability) Rating: 4.00
Posted on 2022-02-14 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Cash Box 2 (in Numbers) Rating: 4.00
Posted on 2022-01-26 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5You Supply the Vowels (in Word Problems) Rating: 4.00
Posted on 2022-01-21 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 52-Row Number Grid (in Numbers) Rating: 5.00
Posted on 2022-01-15 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 512-Step Ladder (in Word Problems) Rating: 4.00
Posted on 2022-01-01 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Add the Same Letter (in Word Problems) Rating: 4.00
Posted on 2021-12-28 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Cyclic Add-A-Letter (in Word Problems) Rating: 4.00
Posted on 2021-12-15 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Age Disparities (in Liars and Knights) Rating: 4.00
Posted on 2021-12-06 by Charlie (Solution Posted, 2 Comments)
Difficulty: 1 of 5Limited Alphabet (in Word Problems) Rating: 3.50
Posted on 2021-11-29 by Charlie (Solution Posted, 3 Comments)
Difficulty: 1 of 5Adds Up 2 Ways (in Numbers) Rating: 5.00
Posted on 2021-11-24 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Common Birth Dates II (in Probability) Rating: 4.50
Posted on 2021-11-17 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Phone Keys (in Word Problems) Rating: 3.00
Posted on 2021-11-11 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Cross Anagrams (in Word Problems) Rating: 5.00
Posted on 2021-11-01 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Common Birth Dates (in Probability) Rating: 4.33
Posted on 2021-09-29 by Charlie (Solution Posted, 7 Comments)
Difficulty: 2 of 5Number the Grid (in Numbers) Rating: 5.00
Posted on 2021-07-19 by Charlie (Solution Posted, 7 Comments)
Difficulty: 2 of 5Times Square 3 (in Numbers) Rating: 3.00
Posted on 2021-06-28 by Charlie (Solution Posted, 8 Comments)
Difficulty: 3 of 5Two Probability Distributions (in Algorithms) Rating: 5.00
Posted on 2021-06-21 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Alphabetical Plaintext (in Word Problems) Rating: 4.00
Posted on 2021-06-08 by Charlie (Solution Posted, 4 Comments)
Difficulty: 4 of 5Card Deck: Complete a set, before... (in Probability) Rating: 4.00
Posted on 2021-05-25 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Bouncing Bishops (in General) Rating: 3.00
Posted on 2021-04-15 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Square Deal (in Word Problems) Rating: 4.00
Posted on 2021-03-30 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5A Rebus (in Word Problems) Rating: 5.00
Posted on 2021-02-15 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Salt (in Word Problems) Rating: 4.67
Posted on 2021-01-11 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5A's, B's, C's and D's 4 (in Logic) Rating: 4.00
Posted on 2021-01-07 by Charlie (Solution Posted, 3 Comments)
Difficulty: 4 of 5Not The Weakest Link (in Probability) Rating: 5.00
Posted on 2020-12-28 by Charlie (Solution Posted, 8 Comments)
Difficulty: 2 of 5Metagame: Set and Match (in Probability) Rating: 3.00
Posted on 2020-10-27 by Charlie (Solution Posted, 6 Comments)
Difficulty: 2 of 5Chuck-A-Luck (in Probability) Rating: 3.00
Posted on 2020-10-22 by Charlie (Solution Posted, 6 Comments)
Difficulty: 2 of 5The King Shows Some Mercy (in Probability) Rating: 3.00
Posted on 2020-10-19 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Countries Grand Kids (in Word Problems) Rating: 3.00
Posted on 2020-10-07 by Charlie (Solution Posted, 2 Comments)
Difficulty: 1 of 5Antonyms (in Word Problems) Rating: 4.33
Posted on 2020-09-28 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Last Letters (in Word Problems) Rating: 3.00
Posted on 2020-09-21 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5S.S. Minnow SOS (in Probability)
Posted on 2020-09-02 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Two Pill Bottles (in Probability)
Posted on 2020-08-19 by Charlie (Solution Posted, 6 Comments)
Difficulty: 2 of 5Numbered Balls in Test Tubes 2 (in Logic) Rating: 3.00
Posted on 2020-08-10 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Gamow's Elevator (in Probability) Rating: 2.67
Posted on 2020-07-26 by Charlie (Solution Posted, 10 Comments)
Difficulty: 2 of 5Family Affair (in Word Problems)
Posted on 2020-07-20 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Key Phrase 2 (in Word Problems)
Posted on 2020-02-24 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Skyscrapers 2 (in Logic) Rating: 3.00
Posted on 2020-01-27 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Set-Free (in Logic) Rating: 3.00
Posted on 2020-01-20 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Find the Holes (in Logic)
Posted on 2020-01-15 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Numbered Balls in Test Tubes (in Logic) Rating: 4.00
Posted on 2020-01-06 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Ten Crossed Words (in Word Problems) Rating: 5.00
Posted on 2019-12-16 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5ABC (in Logic) Rating: 3.00
Posted on 2019-12-02 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Letters (in General) Rating: 5.00
Posted on 2019-11-11 by Charlie (Solution Posted, 5 Comments)
Difficulty: 4 of 5Seinfeld said (in Word Problems) Rating: 2.00
Posted on 2019-11-07 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Unrelated Become Antonyms (in Word Problems) Rating: 3.00
Posted on 2019-10-28 by Charlie (Solution Posted, 6 Comments)
Difficulty: 2 of 5Same Letter, Same Color 2 (in Word Problems)
Posted on 2019-10-15 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Twin Words (in Word Problems)
Posted on 2019-09-16 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5A's, B's, C's and D's 3 (in Logic) Rating: 3.00
Posted on 2019-09-14 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Change and Slide (in Word Problems) Rating: 3.00
Posted on 2019-08-26 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5A's, B's, C's and D's 2 (in Logic) Rating: 5.00
Posted on 2019-07-03 by Charlie (Solution Posted, 13 Comments)
Difficulty: 2 of 5six words--some letters in common (in Word Problems) Rating: 5.00
Posted on 2019-06-26 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Number Cards Before Face Cards (in Probability) Rating: 3.00
Posted on 2019-05-02 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Alphabetic Crosswords III (in Word Problems)
Posted on 2019-04-30 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Topical Quotation IX (in Word Problems) Rating: 5.00
Posted on 2019-04-25 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Numbers by Paint (in Logic) Rating: 4.00
Posted on 2019-04-23 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Blobs' Borders 2 (in Shapes)
Posted on 2019-04-10 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Connect the Numbers (in Shapes)
Posted on 2019-04-08 by Charlie (Solution Posted, 0 Comments)
Difficulty: 1 of 5Butcher, Baker, Doctor, and Lawyer (in Liars and Knights) Rating: 5.00
Posted on 2019-04-02 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Words 5x5 (in Word Problems)
Posted on 2019-03-27 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Blobs' Borders (in Shapes)
Posted on 2019-03-25 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Given the Start (in Word Problems)
Posted on 2019-03-22 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Key Phrase (in Cryptography) Rating: 3.00
Posted on 2019-03-11 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5BAD Ceed (in Logic)
Posted on 2019-02-27 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Trees, Teas, and Peas (in Word Problems)
Posted on 2019-02-18 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Oscar Wilde Said (in Word Problems)
Posted on 2019-01-14 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Nine Digits in a Grid (in Numbers) Rating: 3.50
Posted on 2018-12-17 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5The Same Four Letters (in Word Problems) Rating: 3.00
Posted on 2018-11-27 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5SETI (in Sequences) Rating: 5.00
Posted on 2018-11-20 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Plaintext in Order (in Word Problems) Rating: 5.00
Posted on 2018-11-14 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Rectangles 2 (in Shapes)
Posted on 2018-11-13 by Charlie (Solution Posted, 1 Comments)
Difficulty: 1 of 512 Days of Christmas (in Numbers)
Posted on 2018-11-03 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Chain of Primes (in Numbers)
Posted on 2018-10-23 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Tryout (in Word Problems)
Posted on 2018-10-11 by Charlie (Solution Posted, 1 Comments)
Difficulty: 1 of 5Times Square 2 (in Numbers)
Posted on 2018-10-08 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Scrambled Middles (in Word Problems)
Posted on 2018-10-02 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Mixed Box (in Word Problems)
Posted on 2018-09-27 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Cash Box (in Numbers) Rating: 3.00
Posted on 2018-09-19 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Painless Problem (in Word Problems) Rating: 3.00
Posted on 2018-09-10 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 510-Word Square (in Word Problems)
Posted on 2018-08-27 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Attendance Records (in Numbers)
Posted on 2018-08-10 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Squares in a Square (in Shapes) Rating: 5.00
Posted on 2018-08-01 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Topical Quotation VIII (in Word Problems) Rating: 5.00
Posted on 2018-07-19 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Garden Path (in General)
Posted on 2018-07-16 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Sliders II (in Word Problems)
Posted on 2018-07-10 by Charlie (Solution Posted, 5 Comments)
Difficulty: 1 of 5Rectangles (in General)
Posted on 2018-07-03 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Cypher Phrase (in Cryptography) Rating: 3.00
Posted on 2018-06-13 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Five International Delegates (in Logic)
Posted on 2018-04-18 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Some Same Letters (in Word Problems) Rating: 5.00
Posted on 2018-03-27 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Quasi-Fibonacci (in Numbers)
Posted on 2018-03-19 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5A Really Weird Math Problem (in Numbers)
Posted on 2018-03-12 by Charlie (Solution Posted, 13 Comments)
Difficulty: 2 of 5Sliders (in Word Problems)
Posted on 2018-03-06 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5All the Vowels (in Word Problems)
Posted on 2018-02-20 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Random log (in Probability)
Posted on 2018-02-04 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Starting the Scrabble Game (in Probability)
Posted on 2018-01-24 by Charlie (Solution Posted, 8 Comments)
Difficulty: 2 of 5Dividing the Land Evenly (in Geometry)
Posted on 2018-01-09 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Letters in a Box (in Logic)
Posted on 2017-10-30 by Charlie (Solution Posted, 3 Comments)
Difficulty: 4 of 5More Than One Solution? (in Games) Rating: 3.00
Posted on 2017-10-26 by Charlie (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Times Square (in Numbers)
Posted on 2017-10-23 by Charlie (Solution Posted, 2 Comments)
Difficulty: 1 of 5Concatenated Categories (in Word Problems) Rating: 3.00
Posted on 2017-10-09 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Avast Mateys (in Word Problems) Rating: 3.00
Posted on 2017-09-26 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5The next five... (in Sequences)
Posted on 2017-09-20 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Parabolic Numbers (in Just Math)
Posted on 2017-09-18 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Topical Quotation VII (in Word Problems) Rating: 3.00
Posted on 2017-08-31 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 510-Word Square (in Word Problems) Rating: 3.00
Posted on 2017-07-19 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Topical Quotation VI (in Word Problems) Rating: 5.00
Posted on 2017-07-12 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Centenarians (in Logic) Rating: 3.00
Posted on 2017-06-29 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Unreliable Witnesses (in Logic) Rating: 3.67
Posted on 2017-05-17 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Same Letter, Same Color (in Word Problems) Rating: 3.00
Posted on 2017-02-13 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Off and On (in Logic) Rating: 3.00
Posted on 2017-01-29 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Alphabetical Crossword II (in Word Problems) Rating: 3.00
Posted on 2017-01-25 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Topical Quotation V (in Word Problems)
Posted on 2017-01-18 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Alphabetical Crossword (in Word Problems)
Posted on 2017-01-11 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Functional Question (in Just Math)
Posted on 2017-01-10 by Charlie (Solution Posted, 2 Comments)
Difficulty: 1 of 5Beginning of the Month (in Logic) Rating: 5.00
Posted on 2017-01-09 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Animal/Vegetable/Mineral II (in Word Problems)
Posted on 2017-01-06 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Site Seeing II (in Word Problems)
Posted on 2017-01-05 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5A's, B's, C's and D's (in Logic) Rating: 3.00
Posted on 2016-12-30 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Topical Quotation IV (in Word Problems)
Posted on 2016-12-29 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Topical Quotation III (in Word Problems) Rating: 4.00
Posted on 2016-12-16 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Numberless Crossword (in Word Problems) Rating: 3.00
Posted on 2016-12-12 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Topical Quotation II (in Word Problems) Rating: 4.00
Posted on 2016-12-09 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Animal/Vegetable/Mineral (in Word Problems)
Posted on 2016-12-05 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Site Seeing (in Word Problems) Rating: 3.00
Posted on 2016-11-28 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Topical Quotation I (in Word Problems) Rating: 4.00
Posted on 2016-11-23 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Word Square Scramble (in Word Problems) Rating: 3.00
Posted on 2016-11-21 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Double Features (in Word Problems)
Posted on 2016-11-08 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Number prediction (in Tricks)
Posted on 2016-09-26 by Charlie (Solution Posted, 6 Comments)
Difficulty: 1 of 5Biting the Apple (in Tricks)
Posted on 2016-09-21 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Form 21 n Times II (in Numbers)
Posted on 2016-08-11 by Charlie (Solution Posted, 6 Comments)
Difficulty: 2 of 5Puzzle Calendar (in General)
Posted on 2016-05-09 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Form 21 n Times (in Numbers) Rating: 4.00
Posted on 2016-03-11 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Sunset Anomaly (in Science) Rating: 3.00
Posted on 2016-03-09 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5On Track (in Just Math)
Posted on 2016-02-29 by Charlie (Solution Posted, 7 Comments)
Difficulty: 1 of 5Word Grid (in Word Problems)
Posted on 2016-02-04 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5ABCD Grid (in Logic)
Posted on 2015-12-16 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Not Variety, but... (in Word Problems) Rating: 3.00
Posted on 2015-09-03 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5More than Spoonerisms (in Word Problems) Rating: 5.00
Posted on 2015-06-25 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Reverse Sudoku (in General)
Posted on 2015-01-12 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5LCM 540 (in Just Math)
Posted on 2014-12-22 by Charlie (Solution Posted, 10 Comments)
Difficulty: 3 of 5One in Eight (in Cryptography)
Posted on 2014-09-29 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Letter Carrier (in Word Problems)
Posted on 2014-07-03 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Unusual Crossword Puzzle (in Word Problems) Rating: 5.00
Posted on 2014-01-09 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 58 Dice II (in Numbers)
Posted on 2013-12-03 by Charlie (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Face-Up Card Array (in Logic)
Posted on 2013-11-20 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sudoprime (in Numbers) Rating: 4.00
Posted on 2013-09-04 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Faulty Card Shuffler (in General) Rating: 4.00
Posted on 2013-07-24 by Charlie (Solution Posted, 10 Comments)
Difficulty: 2 of 5Elementary Math (in Sequences) Rating: 5.00
Posted on 2013-05-24 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 513-Letter Key (in Cryptography) Rating: 4.40
Posted on 2013-05-16 by Charlie (Solution Posted, 8 Comments)
Difficulty: 1 of 5True Geometry (in Numbers)
Posted on 2013-03-07 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Die Order (in Probability)
Posted on 2013-01-04 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Ring in 2013 (in Numbers) Rating: 4.00
Posted on 2012-12-31 by Charlie (Solution Posted, 5 Comments)
Difficulty: 4 of 5Sixes and Sevens--Not! (in Numbers) Rating: 5.00
Posted on 2012-08-12 by Charlie (Solution Posted, 33 Comments)
Difficulty: 3 of 5DO MAGIC (in Numbers)
Posted on 2012-03-27 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Box of Chocolates (in Probability) Rating: 4.00
Posted on 2012-03-02 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Multi-Birth Convention (in Numbers) Rating: 4.00
Posted on 2012-01-05 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Platonic Colors (in Probability) Rating: 1.00
Posted on 2011-11-21 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Magic 46 (in Numbers)
Posted on 2011-11-03 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Latin Colors (in Shapes)
Posted on 2011-10-26 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Crosswords (in Word Problems)
Posted on 2011-10-14 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Divisible (in Sequences) Rating: 4.00
Posted on 2011-09-30 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Prime Square Dice (in Numbers) Rating: 4.00
Posted on 2011-09-10 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Painted Tetrahedra (in Shapes)
Posted on 2011-08-22 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 559 in one way (in Numbers) Rating: 4.00
Posted on 2011-08-13 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Prime Magic Square (in Numbers) Rating: 5.00
Posted on 2011-08-04 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Carol's Birthday (in Numbers)
Posted on 2011-04-26 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Numeric Keypad (in Numbers)
Posted on 2011-04-15 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Square Semiprime Sums (in Numbers)
Posted on 2011-04-12 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Lacsap's Triangle (in Numbers) Rating: 4.00
Posted on 2011-03-31 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5AutoHomophone (in Word Problems) Rating: 3.67
Posted on 2011-03-22 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Super Ken (in Numbers)
Posted on 2011-03-03 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Atlas From a Map (in Numbers)
Posted on 2011-02-22 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5The Natives of Calendria (in Liars and Knights) Rating: 4.50
Posted on 2011-02-10 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Failure to Communicate (in Probability)
Posted on 2011-02-04 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Contestants in a Circle (in Numbers)
Posted on 2011-01-31 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Semiprime Switch (in Numbers) Rating: 5.00
Posted on 2011-01-18 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Calendar Game (in Logic) Rating: 3.00
Posted on 2011-01-02 by Charlie (Solution Posted, 8 Comments)
Difficulty: 3 of 5Semiprime Names (in Numbers)
Posted on 2010-12-06 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Card Tableau in Black and White (in Logic)
Posted on 2010-11-30 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Ambiguous PIN Code (in Numbers) Rating: 2.50
Posted on 2010-11-17 by Charlie (Solution Posted, 9 Comments)
Difficulty: 2 of 5Odd One Out (in Word Problems)
Posted on 2010-11-10 by Charlie (Solution Posted, 10 Comments)
Difficulty: 3 of 5Length of Angle Bisector (in Geometry) Rating: 2.00
Posted on 2010-11-07 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Jump, Skip and Hop (in Games)
Posted on 2010-11-03 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Primes in Squares (in Numbers)
Posted on 2010-10-19 by Charlie (Solution Posted, 4 Comments)
Difficulty: 1 of 5Full Set of Calendars (in General) Rating: 3.00
Posted on 2010-09-17 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Postage: 1 to N (in Numbers) Rating: 3.00
Posted on 2010-09-02 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5English and French (in Sequences) Rating: 4.00
Posted on 2010-09-01 by Charlie (Solution Posted, 8 Comments)
Difficulty: 3 of 5Self-Referential (in Numbers)
Posted on 2010-07-29 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Iterated Specs (in Just Math)
Posted on 2010-05-28 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Hidden Fruit (in Numbers) Rating: 4.00
Posted on 2010-05-21 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Self-Cardinality (in Numbers) Rating: 3.00
Posted on 2010-05-07 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Thomas Daley Gold (in Numbers)
Posted on 2010-03-28 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Chemical Relativity (in Science) Rating: 3.00
Posted on 2010-03-22 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Ordinal Days (in Numbers) Rating: 2.50
Posted on 2010-02-17 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Rolling Die (in General) Rating: 5.00
Posted on 2009-11-19 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Mensa Maze (in General) Rating: 3.00
Posted on 2009-10-07 by Charlie (Solution Posted, 20 Comments)
Difficulty: 3 of 5Chameleon Island (in Numbers)
Posted on 2009-09-25 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Cutting the Card (in Shapes)
Posted on 2009-09-16 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Legendre's Mistake (in Numbers) Rating: 5.00
Posted on 2009-09-11 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Near Perfect (in Numbers)
Posted on 2009-09-06 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Square of Squares (in Numbers) Rating: 5.00
Posted on 2009-08-31 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Prime * Prime (in Numbers) Rating: 5.00
Posted on 2009-08-15 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 54-Letter Words (in Word Problems)
Posted on 2009-08-09 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Equal Chance (in Probability)
Posted on 2009-08-03 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Word Grid (in Word Problems) Rating: 4.00
Posted on 2009-07-19 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Pandigital Processed Primes (in Numbers)
Posted on 2009-06-27 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Star in the Pentagon (in Geometry)
Posted on 2009-06-09 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Pandigital Recycling Points (in Logic) Rating: 4.00
Posted on 2009-05-31 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Pairs of Prime Factors (in Numbers)
Posted on 2009-05-24 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Tom and Harry Run to School (in Just Math) Rating: 4.00
Posted on 2009-05-20 by Charlie (Solution Posted, 14 Comments)
Difficulty: 3 of 5Roman Square (in Numbers)
Posted on 2009-05-13 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Mirrors in a Hex (in Geometry) Rating: 3.00
Posted on 2009-05-08 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Taking the 5th (in Numbers) Rating: 3.00
Posted on 2009-05-03 by Charlie (Solution Posted, 6 Comments)
Difficulty: 2 of 5North American Swim Meet (in Numbers) Rating: 2.00
Posted on 2009-04-29 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Switching Hands (in Just Math) Rating: 3.00
Posted on 2009-04-25 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Two Squares (in Geometry)
Posted on 2009-04-20 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Millionth Pandigital (in Numbers) Rating: 5.00
Posted on 2009-04-17 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Eight Sticks (in Shapes) Rating: 4.00
Posted on 2009-04-13 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Prime Squares (in Numbers) Rating: 4.00
Posted on 2009-04-09 by Charlie (Solution Posted, 5 Comments)
Difficulty: 4 of 5Alphabet from 8 Words (in Word Problems) Rating: 4.00
Posted on 2009-04-04 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Composite Total (in Numbers) Rating: 2.50
Posted on 2009-03-31 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Dicey numbers (in Numbers)
Posted on 2009-03-27 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 55 x 5 Maze by 2s and 3s (in General) Rating: 4.00
Posted on 2009-03-22 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Neighboring Multiples (in Numbers)
Posted on 2009-03-15 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 51+5+6+7 = 21? (in Numbers)
Posted on 2009-03-12 by Charlie (Solution Posted, 8 Comments)
Difficulty: 3 of 5A Hand of Cards (in Logic) Rating: 1.50
Posted on 2009-03-08 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Bob's Cab (in Numbers) Rating: 4.00
Posted on 2009-03-02 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Factorials to Squares (in Numbers)
Posted on 2009-02-25 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5The Prime Time Soccer Team (in Numbers)
Posted on 2009-02-19 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5The Civic Club (in Just Math) Rating: 2.67
Posted on 2009-02-14 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Non-Multiples (in Numbers)
Posted on 2009-02-10 by Charlie (Solution Posted, 4 Comments)
Difficulty: 4 of 5Five from Three (in Word Problems) Rating: 5.00
Posted on 2009-02-05 by Charlie (Solution Posted, 3 Comments)
Difficulty: 4 of 5Top 40 (in Numbers) Rating: 4.50
Posted on 2009-01-29 by Charlie (Solution Posted, 11 Comments)
Difficulty: 3 of 5January Math Challenge in 3 Parts (in Numbers) Rating: 3.00
Posted on 2009-01-08 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Two Polygons (in Numbers)
Posted on 2008-10-29 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5THREE Triangular Numbers (in Numbers) Rating: 3.50
Posted on 2008-10-21 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Classroom Dice (in Numbers) Rating: 4.00
Posted on 2008-09-24 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5DVR Alphabets (in General)
Posted on 2008-09-15 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5All 10 Digits (in Numbers) Rating: 5.00
Posted on 2008-08-12 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Subsquares (in Numbers) Rating: 5.00
Posted on 2008-05-21 by Charlie (Solution Posted, 9 Comments)
Difficulty: 3 of 5Continental Pole of Inaccessibility (in General) Rating: 4.50
Posted on 2008-05-14 by Charlie (Solution Posted, 17 Comments)
Difficulty: 3 of 5Beyond Fermat (in Numbers) Rating: 3.00
Posted on 2008-05-05 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Fund Raiser (in Numbers) Rating: 4.00
Posted on 2008-05-01 by Charlie (Solution Posted, 1 Comments)
Difficulty: 2 of 5Added Value (in Sequences) Rating: 2.43
Posted on 2008-04-13 by Charlie (Solution Posted, 8 Comments)
Difficulty: 3 of 5Penny Piles (in Numbers) Rating: 3.00
Posted on 2008-04-09 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Who's Younger? (in Liars and Knights) Rating: 3.00
Posted on 2008-04-01 by Charlie (Solution Posted, 10 Comments)
Difficulty: 3 of 5One More Factor, Please (in Numbers) Rating: 3.33
Posted on 2008-03-23 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Pandigital Squares II (in Numbers) Rating: 1.00
Posted on 2008-03-15 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Layover at LaGuardia (in Logic) Rating: 2.33
Posted on 2008-02-29 by Charlie (Solution Posted, 2 Comments)
Difficulty: 2 of 5Counting One's Marbles (in Probability) Rating: 5.00
Posted on 2008-02-18 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Truncated Cube (in Shapes) Rating: 3.00
Posted on 2008-02-14 by Charlie (Solution Posted, 11 Comments)
Difficulty: 3 of 5Portuguese Squares (in Numbers) Rating: 3.00
Posted on 2008-02-10 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5These Letters (in Sequences) Rating: 3.00
Posted on 2008-02-07 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Carny Game (in Probability) Rating: 3.50
Posted on 2008-02-04 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Tennis Balls (in Games) Rating: 5.00
Posted on 2008-01-29 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 552 Pickup (in Probability) Rating: 5.00
Posted on 2008-01-15 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Orders of Finish (in Numbers)
Posted on 2008-01-12 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Triangular Ring (in Numbers) Rating: 2.67
Posted on 2008-01-09 by Charlie (Solution Posted, 9 Comments)
Difficulty: 3 of 5Two Triangles Divided (in Geometry)
Posted on 2007-12-16 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Ways of the Grid (in Numbers) Rating: 3.00
Posted on 2007-12-04 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Square Birthdays (in Numbers) Rating: 3.33
Posted on 2007-11-29 by Charlie (Solution Posted, 7 Comments)
Difficulty: 4 of 5Product Four Times Sum (in Numbers) Rating: 3.00
Posted on 2007-11-23 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Four 2's (in Numbers) Rating: 2.33
Posted on 2007-11-20 by Charlie (Solution Posted, 2 Comments)
Difficulty: 4 of 5Solar System (in Numbers)
Posted on 2007-11-13 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Metadivisible (in Numbers) Rating: 3.67
Posted on 2007-11-09 by Charlie (Solution Posted, 4 Comments)
Difficulty: 1 of 5Donuts (in Liars and Knights) Rating: 4.00
Posted on 2007-11-05 by Charlie (Solution Posted, 6 Comments)
Difficulty: 4 of 5Color Coded Cubes (in Numbers) Rating: 3.67
Posted on 2007-10-30 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Color Coded Cards (in Logic) Rating: 3.50
Posted on 2007-10-17 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Mixing Meters, Yards and Months (in Numbers) Rating: 3.00
Posted on 2007-10-04 by Charlie (Solution Posted, 9 Comments)
Difficulty: 3 of 5More Power 2 the Cards (in Probability) Rating: 5.00
Posted on 2007-10-01 by Charlie (Solution Posted, 0 Comments)
Difficulty: 3 of 5Cutting Edge (in Shapes) Rating: 4.00
Posted on 2007-09-18 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Deck of Cards Almanac (in Numbers) Rating: 3.00
Posted on 2007-09-11 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Equilateral Triangle 123 (in Shapes) Rating: 4.33
Posted on 2007-09-05 by Charlie (Solution Posted, 3 Comments)
Difficulty: 4 of 5TGIF (in Logic) Rating: 4.00
Posted on 2007-08-31 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Grid of Little Squares (in Numbers) Rating: 2.00
Posted on 2007-08-07 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Six Digits (in Numbers) Rating: 4.00
Posted on 2007-07-18 by Charlie (Solution Posted, 3 Comments)
Difficulty: 2 of 5Who Stole Dr. Jones' Clock? (in Logic) Rating: 3.50
Posted on 2007-07-09 by Charlie (Solution Posted, 13 Comments)
Difficulty: 3 of 5A Game of Tennis (in Probability) Rating: 3.50
Posted on 2007-07-05 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Count in German (in Numbers) Rating: 3.00
Posted on 2007-06-20 by Charlie (Solution Posted, 4 Comments)
Difficulty: 4 of 5Missing Digit (in Logic) Rating: 3.67
Posted on 2007-06-04 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Soccer Stats (in Logic) Rating: 3.00
Posted on 2007-05-22 by Charlie (Solution Posted, 9 Comments)
Difficulty: 2 of 5Simple Sequence (in Sequences) Rating: 4.00
Posted on 2007-05-07 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Triangular Triples (in Numbers) Rating: 4.00
Posted on 2007-04-21 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Cribbed Idea (in Numbers)
Posted on 2007-04-15 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5What is RUST? (in Numbers) Rating: 4.50
Posted on 2007-02-23 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5What is RIGHT? (in Logic) Rating: 4.00
Posted on 2007-02-17 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Aussie Rules (in Logic)
Posted on 2007-02-16 by Charlie (Solution Posted, 2 Comments)
Difficulty: 5 of 5Binary Repunit Fibonaccis (in Numbers) Rating: 5.00
Posted on 2007-01-22 by Charlie (Solution Posted, 6 Comments)
Difficulty: 4 of 5Stellar Words (in Sequences) Rating: 5.00
Posted on 2007-01-18 by Charlie (Solution Posted, 11 Comments)
Difficulty: 3 of 5Vicious Circle (in Numbers) Rating: 5.00
Posted on 2007-01-17 by Charlie (Solution Posted, 3 Comments)
Difficulty: 1 of 5Cooking for the Native Americans (in Riddles) Rating: 1.67
Posted on 2007-01-12 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 5Map Projection (in Shapes) Rating: 4.25
Posted on 2007-01-03 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Buster's Terminal Velocity (in Science) Rating: 4.00
Posted on 2006-12-27 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Cross-Country Runners (in Numbers) Rating: 3.67
Posted on 2006-12-23 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Magic circle (in General)
Posted on 2006-12-16 by Charlie (Solution Posted, 7 Comments)
Difficulty: 4 of 5On Target (in Geometry)
Posted on 2006-10-09 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Pandigital Multiplication and Division (in Numbers) Rating: 4.00
Posted on 2006-10-07 by Charlie (Solution Posted, 8 Comments)
Difficulty: 3 of 5Spelling Card Trick II (in General) Rating: 2.50
Posted on 2006-09-29 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Pandigital Sum (in Numbers) Rating: 5.00
Posted on 2006-09-19 by Charlie (Solution Posted, 5 Comments)
Difficulty: 3 of 5Base-26 (in Word Problems)
Posted on 2006-09-16 by Charlie (Solution Posted, 5 Comments)
Difficulty: 4 of 5No Repeats (in Games) Rating: 4.50
Posted on 2006-09-13 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Pandigital Squares (in Logic) Rating: 3.00
Posted on 2006-09-01 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5To the Airport (in General) Rating: 4.00
Posted on 2006-06-27 by Charlie (Solution Posted, 4 Comments)
Difficulty: 3 of 5Countries of the World (in Word Problems) Rating: 4.33
Posted on 2006-06-09 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5All Four Suits (in Probability) Rating: 4.25
Posted on 2006-06-06 by Charlie (Solution Posted, 8 Comments)
Difficulty: 4 of 5Semi-Minimalist Painting (in Logic) Rating: 3.20
Posted on 2006-03-13 by Charlie (Solution Posted, 10 Comments)
Difficulty: 2 of 5Pair of Quadrilaterals (in Shapes) Rating: 4.00
Posted on 2006-02-17 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Three Cubed (in Numbers) Rating: 3.00
Posted on 2005-11-19 by Charlie (Solution Posted, 9 Comments)
Difficulty: 3 of 5Numbers À Propos (in Word Problems) Rating: 4.20
Posted on 2005-09-20 by Charlie (Solution Posted, 3 Comments)
Difficulty: 3 of 5Divide into Primes (in Logic) Rating: 3.29
Posted on 2005-09-17 by Charlie (Solution Posted, 13 Comments)
Difficulty: 3 of 5Polynomials (in Just Math) Rating: 4.00
Posted on 2005-05-10 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Roll the Die Higher (in Probability) Rating: 3.86
Posted on 2005-04-07 by Charlie (Solution Posted, 13 Comments)
Difficulty: 3 of 5Shoelaces (in Probability) Rating: 3.83
Posted on 2005-04-05 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Random Check (in Algorithms) Rating: 3.00
Posted on 2005-02-11 by Charlie (Solution Posted, 11 Comments)
Difficulty: 3 of 5Payroll (in Just Math) Rating: 3.75
Posted on 2005-01-02 by Charlie (Solution Posted, 10 Comments)
Difficulty: 2 of 5Faster (in Just Math) Rating: 3.45
Posted on 2004-11-29 by Charlie (Solution Posted, 10 Comments)
Difficulty: 3 of 5Lead Floats (in Science) Rating: 2.33
Posted on 2004-02-25 by Charlie (Solution Posted, 34 Comments)
Difficulty: 4 of 5Domino Chain (in Probability) Rating: 3.71
Posted on 2004-02-11 by Charlie (Solution Posted, 19 Comments)
Difficulty: 3 of 5Word Ladder Construction (in Algorithms) Rating: 3.00
Posted on 2004-01-15 by Charlie (Solution Posted, 7 Comments)
Difficulty: 4 of 5Words In Common 10 (in Word Problems) Rating: 2.83
Posted on 2003-12-15 by Charlie (Solution Posted, 17 Comments)
Difficulty: 3 of 5Fifth Thursdays (in Algorithms) Rating: 3.40
Posted on 2003-10-06 by Charlie (Solution Posted, 2 Comments)
Difficulty: 4 of 5Word Ladders (in Algorithms) Rating: 3.00
Posted on 2003-09-24 by Charlie (Solution Posted, 11 Comments)
Difficulty: 3 of 5Distant Solar System (in Science) Rating: 2.60
Posted on 2003-09-18 by Charlie (Solution Posted, 14 Comments)
Difficulty: 3 of 5Permutations (in Algorithms) Rating: 4.00
Posted on 2003-07-02 by Charlie (Solution Posted, 14 Comments)
Difficulty: 3 of 5Real Nim Variations (in Games) Rating: 4.33
Posted on 2003-05-18 by Charlie (Solution Posted, 7 Comments)
Difficulty: 3 of 5Next in Line (in Sequences) Rating: 2.33
Posted on 2003-05-12 by Charlie (Solution Posted, 9 Comments)
Difficulty: 4 of 5Location X (in Geometry) Rating: 3.00
Posted on 2003-05-05 by Charlie (Solution Posted, 6 Comments)
Difficulty: 3 of 5Craps (in Probability) Rating: 3.50
Posted on 2003-04-18 by Charlie (Solution Posted, 19 Comments)
Difficulty: 4 of 5Amoeba Colony (in Probability) Rating: 4.20
Posted on 2003-04-04 by Charlie (Solution Posted, 4 Comments)
Difficulty: 2 of 5Equidistant points on the Axes (in Geometry) Rating: 3.20
Posted on 2003-03-28 by Charlie (Solution Posted, 10 Comments)
Difficulty: 5 of 5Thirteen Words (in Word Problems) Rating: 3.60
Posted on 2003-03-19 by Charlie (Solution Posted, 14 Comments)
Difficulty: 4 of 5The Flooble Code (in Probability) Rating: 3.50
Posted on 2003-03-18 by Charlie (Solution Posted, 12 Comments)
Difficulty: 5 of 5Probability of All of a Set (in Probability) Rating: 3.25
Posted on 2003-03-13 by Charlie (Solution Posted, 11 Comments)
Difficulty: 3 of 5Earth's Momentum (in Science) Rating: 3.00
Posted on 2003-03-12 by Charlie (Solution Posted, 16 Comments)
Difficulty: 3 of 5Sunlight over the World (in Science) Rating: 2.60
Posted on 2003-03-09 by Charlie (Solution Posted, 6 Comments)
Difficulty: 2 of 5Earth Slowing Down (in Science) Rating: 2.50
Posted on 2003-03-08 by Charlie (Solution Posted, 5 Comments)
Difficulty: 2 of 52,000,000 Coin Tosses (in Probability) Rating: 3.00
Posted on 2003-03-03 by Charlie (Solution Posted, 10 Comments)
Difficulty: 4 of 5Non-Attacking Chess Pieces (in Games) Rating: 3.80
Posted on 2003-02-27 by Charlie (Solution Posted, 12 Comments)
Difficulty: 5 of 5Dice Proposition (in Probability) Rating: 4.20
Posted on 2003-02-22 by Charlie (Solution Posted, 5 Comments)
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