I think the description and test suite on this problem is slightly off. When I see 'union' I already assume that no duplicates are permitted and order is irrelevant.
Back to basics 22 - Rotate a matrix
sum of non-primes
CONVERT TAN TO SIN
Convert given decimal number to binary number.
Matlab Basics II - Max & Index of Max
Find the index of n in magic(n)
index of n^2 in magic(n)
Alternately upper-lower case
interesting center of magic matrix
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