A cheat solution.
The fractions are not a simplify fractions.
Which doors are open?
Project Euler: Problem 5, Smallest multiple
Better bullseye matrix
Number of 1s in a binary string
Create an array (n,n) where only diagonal elements are '1' and others are '0'
Legend of Zelda - Rupee Count
Divisible by 10
Lights Out 15 - 5x5, broken buttons I
Scrabble Scores - 4
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