Maybe more test cases here? ;-)
Number of 1s in the Binary Representation of a Number
Back to basics 8 - Matrix Diagonals
Determine Whether an array is empty
Who invented zero?
Find the area of the four walls
Concatenate two strings
Reverse a matrix
Create the following sequence : 0 1 1 4 9 25 64 169 ...
Convert a number to its Roman representation
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