Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.
Finding Perfect Squares
Which values occur exactly three times?
Determine Whether an array is empty
Rotate matrix by -90 degrees
Approximate the inverse tangent by power series
Get the value 100
Get the mean digit
Alternating 1´s and 0´s in a matrix
Ratio between sum of primer numbers and non-prime numbers
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