Remove all the consonants
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Derivative of polynomial
Sum the numbers on the main diagonal
Pandigital number n°1 (Inspired by Project Euler 32)
Expression or variable?
Permute diagonal and antidiagonal
Numbers spiral diagonals (Part 1)
Can you beat the lottery again (for hardcore coder) ?
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