Test added to discourage lookup table solutions.
In the problem description, r1 and r2 appear to be upside down.
Corrected. Thanks, Tim.
give nth decimal place of pi
We love vectorized solutions. Problem 1 : remove the row average.
Volume of a Simplex
Maximum value in a matrix
Draw a 'X'!
Compute the Euler totient function
Compute expulsions from the Kimberling shuffle
Determine whether a number is a prime self number
List the emirps
Compute the arithmetic derivative of integers
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