Problem 44227. Divisible by 21
Write a function to determine if a number is divisible by 21.
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4 Comments
A lot of why ...
The problem maker in this case (no pun intended) simply copied the test case from my Divisible by 7 problem and made some edits, but obviously not enough to make it solvable. I've greatly simplified the test suite for this problem so that it is now solvable.
Thanks Grant.
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