Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.
Remove all the consonants
Is the Point in a Circle?
Count up then down
length of a vector
Remove the first, third and fifth rows of a matrix
Check if is a square
Ratio between sum of primer numbers and non-prime numbers
Ratio between sum of primes and sum of factors
Double the next!
Say type of roots in quadratic equation
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