In general, this solution is not valid for single digit numbers.
code won't work for 0,4,8 I just took advantage of test code :(
If input n_str = < '9', then you get Error: Subscript indices must either be real positive integers or logicals.
given 3 sides, find area of this triangle
Project Euler: Problem 7, Nth prime
Back to basics 1 - Saving
How many trades represent all the profit?
Divisible by 10
Rule of mixtures (composites) - lower and upper bounds
I Plead the Fifth
Divisible by 6
Lights Out 2 - 5x5, 4 moves
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