One interesting spin is: can you solve this problem using a freepass?
It will, but will the freepass work again if I rescore the solution? :-)
Now you're just showing off... :-P
Project Euler: Problem 9, Pythagorean numbers
Is this matrix orthogonal?
Sum of diagonal of a square matrix
Stuff the Board
Wheat on a chessboard pt 1
Pandigital Multiples of 11 (based on Project Euler 491)
Some Assembly Required
Lowest sum from a group of digits
Sums of Multiple Pairs of Triangular Numbers
It's going down. We're finding simbers!
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