so good solutions
Times 2 - START HERE
Sum all integers from 1 to 2^n
Swap two numbers
Side of an equilateral triangle
Word Search Solver
Dice roll - lateral faces
Rule of mixtures (composites) - lower bound
Lights Out 8 - 5x5, light-only solution? I
Divisible by n, prime divisors - 11, 13, 17, & 19
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