Chris problems are kinda my favourite :)
Very nice problem
Back and Forth Rows
Back to basics 9 - Indexed References
Find the hypotenuse
How brilliant are you?
Iccanobif numbers 1
Determine digits of the Copeland-Erdos constant
Determine whether a number is a prime self number
Compute the nth term from the Sieve of Flavius Josephus
Count unique orderings of vertices of a polygon
Solve the Challenger puzzle
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