Oops, this is not a complete answer, despite passing the tests.
Test if a Number is a Palindrome without using any String Operations
Better bullseye matrix
Is A the inverse of B?
Is the Point in a Circle?
Find a Pythagorean triple
Mastermind IV: Optimal Solver - max of 5 guesses
Slitherlink I: Trivial
Text File Read: 64 bit data set
Solve Rubik's Cube - One Rotation
GJam 2011 Africa Qualifier C: House, maximum area rectangle
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