I didn't realize you could use that function with non-digits in your string. Suddenly, this problem is a whole lot easier. :-)
Sums with Excluded Digits
Find common elements in matrix rows
Project Euler: Problem 10, Sum of Primes
Back to basics 12 - Input Arguments
Get the length of a given vector
Return elements unique to either input
Two fractions, one sum
Should Mr McNugget even get out of bed today?
Break it up! Break it up!
How Far Can You Throw Something?
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