Permute diagonal and antidiagonal
Given a matrix, swap the 2nd & 3rd columns
Dots in a Circle
03 - Matrix Variables 3
find the surface area of a cube
Scrabble Scores - 7
Combined Ages 3 - Non-symmetric, n ≥ 3
Scrabble Scores - 13
Highly divisible triangular number (inspired by Project Euler 12)
Divisible by 5
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