The description was improved and the test suite fixed.
Remove any row in which a NaN appears
Project Euler: Problem 10, Sum of Primes
Multiply a column by a row
Find a Pythagorean triple
Test Problem; Create a 5x5 array containing all ones
Project Euler: Problem 14 Longest Collatz sequence
Project Euler 249: Prime Subset Sums
What can you get for exactly amount of money(harder)
Exponents in Factorials(hard)
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