Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.
Calculate the height of an object dropped from the sky
Is this triangle right-angled?
Concatenate two strings
Divisible by 4
Ratio between sum of primes and sum of factors
Get the mean digit
Ratio between sum of primer numbers and non-prime numbers
Check if is a square
Alternating 1´s and 0´s in a matrix
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