Blindfolded at the Great Wall of China (in Geometry) Rating: 4.50
Posted on 2010-07-29 by David Shin (No Solution Yet, 10 Comments)
Posted on 2010-07-29 by David Shin (No Solution Yet, 10 Comments)
Radioactive Coins (in Weights and Scales) Rating: 4.50
Posted on 2006-10-17 by David Shin (No Solution Yet, 20 Comments)
Posted on 2006-10-17 by David Shin (No Solution Yet, 20 Comments)
Mental Math Competition (in Algorithms) Rating: 2.20
Posted on 2005-04-29 by David Shin (Solution Posted, 7 Comments)
Posted on 2005-04-29 by David Shin (Solution Posted, 7 Comments)
Only One Hand (in Games) Rating: 4.29
Posted on 2005-04-11 by David Shin (Solution Posted, 31 Comments)
Posted on 2005-04-11 by David Shin (Solution Posted, 31 Comments)
Animal + Plant (in Word Problems) Rating: 3.33
Posted on 2005-04-09 by David Shin (Solution Posted, 17 Comments)
Posted on 2005-04-09 by David Shin (Solution Posted, 17 Comments)
Digit Counting (in Numbers) Rating: 3.33
Posted on 2005-02-25 by David Shin (Solution Posted, 2 Comments)
Posted on 2005-02-25 by David Shin (Solution Posted, 2 Comments)
Quadruplets with Square Triplets (in Numbers) Rating: 4.00
Posted on 2005-02-23 by David Shin (Solution Posted, 10 Comments)
Posted on 2005-02-23 by David Shin (Solution Posted, 10 Comments)
Sums of Squares (in Numbers) Rating: 3.29
Posted on 2005-02-21 by David Shin (Solution Posted, 8 Comments)
Posted on 2005-02-21 by David Shin (Solution Posted, 8 Comments)
Lucky Numbers (in Numbers) Rating: 3.75
Posted on 2005-02-19 by David Shin (Solution Posted, 7 Comments)
Posted on 2005-02-19 by David Shin (Solution Posted, 7 Comments)
Biased Coins (in Just Math) Rating: 4.00
Posted on 2005-02-17 by David Shin (Solution Posted, 9 Comments)
Posted on 2005-02-17 by David Shin (Solution Posted, 9 Comments)
Figure Eights (in General) Rating: 4.20
Posted on 2005-02-15 by David Shin (Solution Posted, 34 Comments)
Posted on 2005-02-15 by David Shin (Solution Posted, 34 Comments)
Only Isosceles (in Geometry) Rating: 4.50
Posted on 2005-02-13 by David Shin (Solution Posted, 6 Comments)
Posted on 2005-02-13 by David Shin (Solution Posted, 6 Comments)
Four Pins and a Rubber Band (in Probability) Rating: 4.10
Posted on 2005-02-10 by David Shin (Solution Posted, 11 Comments)
Posted on 2005-02-10 by David Shin (Solution Posted, 11 Comments)
God and the Devil (in Games) Rating: 3.68
Posted on 2005-02-08 by David Shin (Solution Posted, 67 Comments)
Posted on 2005-02-08 by David Shin (Solution Posted, 67 Comments)
Connect The Dots (in Geometry) Rating: 3.67
Posted on 2005-02-06 by David Shin (Solution Posted, 15 Comments)
Posted on 2005-02-06 by David Shin (Solution Posted, 15 Comments)
Pizza Cutter (in Geometry) Rating: 3.67
Posted on 2005-02-04 by David Shin (Solution Posted, 11 Comments)
Posted on 2005-02-04 by David Shin (Solution Posted, 11 Comments)
Four Disks (in Geometry) Rating: 3.00
Posted on 2005-02-02 by David Shin (Solution Posted, 5 Comments)
Posted on 2005-02-02 by David Shin (Solution Posted, 5 Comments)
A Square Triangulation (in Shapes) Rating: 4.00
Posted on 2005-01-31 by David Shin (Solution Posted, 4 Comments)
Posted on 2005-01-31 by David Shin (Solution Posted, 4 Comments)
Bisect The Segment (in Geometry) Rating: 4.00
Posted on 2005-01-29 by David Shin (Solution Posted, 8 Comments)
Posted on 2005-01-29 by David Shin (Solution Posted, 8 Comments)
One Word, Seven Times (in Word Problems) Rating: 3.50
Posted on 2005-01-27 by David Shin (Solution Posted, 14 Comments)
Posted on 2005-01-27 by David Shin (Solution Posted, 14 Comments)
Consecutive Primes (in Just Math) Rating: 3.17
Posted on 2005-01-24 by David Shin (Solution Posted, 6 Comments)
Posted on 2005-01-24 by David Shin (Solution Posted, 6 Comments)
Word Meld 7 (in Word Problems) Rating: 2.67
Posted on 2005-01-22 by David Shin (Solution Posted, 12 Comments)
Posted on 2005-01-22 by David Shin (Solution Posted, 12 Comments)
Broken Calculator (in Just Math) Rating: 3.63
Posted on 2005-01-20 by David Shin (Solution Posted, 14 Comments)
Posted on 2005-01-20 by David Shin (Solution Posted, 14 Comments)
Homophonic Equality (in Word Problems) Rating: 5.00
Posted on 2005-01-18 by David Shin (Solution Posted, 10 Comments)
Posted on 2005-01-18 by David Shin (Solution Posted, 10 Comments)
Four Letter Sequences (in Word Problems) Rating: 3.67
Posted on 2005-01-12 by David Shin (Solution Posted, 9 Comments)
Posted on 2005-01-12 by David Shin (Solution Posted, 9 Comments)
Bumper Cars (in Logic) Rating: 2.50
Posted on 2004-12-30 by David Shin (Solution Posted, 15 Comments)
Posted on 2004-12-30 by David Shin (Solution Posted, 15 Comments)
Remainder of One (in Just Math) Rating: 3.88
Posted on 2004-12-29 by David Shin (Solution Posted, 13 Comments)
Posted on 2004-12-29 by David Shin (Solution Posted, 13 Comments)