I didn't realize you could use that function with non-digits in your string. Suddenly, this problem is a whole lot easier. :-)
Add two numbers
Back to basics 5 - Clipboard
Number of 1s in a binary string
Whether the input is vector?
What digit is it?
A matrix of extroverts
Pandigital Multiples of 11 (based on Project Euler 491)
Some Assembly Required
How Far Can You Throw Something?
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