Return x by adding a random number to it.
There is a serious disconnect between the problem statement and what is actually being tested.
Increment a number, given its digits
Who knows the last digit of pi?
Energy of a photon
Calculate the area of a triangle between three points
Count decimal digits of a number
Probabilities - Balls and urns - 01
Probabilities - More brains than luck
Find the diagonal of the square of side L
Non trivial identities - reshape
Probabilities - Balls and urns - 02
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