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Shortest solution (so far) that keeps to the spirit of the challenge. Code is also easy to read.
Another short solution that keeps to the spirit of the challenge.
Times 2 - START HERE
Find the palindrome
Test for balanced parentheses
sum of non-primes
Say something funny
Divisible by 5
Divisible by 4
Rule of mixtures (composites) - upper bound
Fill-a-pix - Solver (basic)
Divisible by 3
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