I fought against this problem during months... :)
Dear James, I got a few questions: how old are your lovely daughter? and how insanely creepy is this teacher to put number like "225802467" in her homework? That just kill us too.
Create a square matrix of multiples
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Determine if input is a perfect number
Don't be mean. Be nice!
Pseudo Square Root (Inspired by Project Euler 266)
Rolling maximums above a threshold
The Hills Are Alive...
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