Back and Forth Rows
Increment a number, given its digits
Project Euler: Problem 6, Natural numbers, squares and sums.
sum of non-primes
GJam 2012 Qualifier: Tongues
Prime Sequences: AP-k Minimum Final Value
Remove NaNs and numbers adjacent to NaNs
Kryptos - CIA Cypher Sculpture: Vignere Decryption
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