Distance walked 1D
Bottles of beer
Count letters occurence in text, specific to words with a given length.
Is this triangle right-angled?
Replace secondary diagonal elements of a square array
Pass the cards in Fitch Cheney's five-card trick
Solve a Weird Calculator puzzle
Create a sequence of primes p such that p > n π(p)
List the dihedral primes
Solve an ODE: equation B
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