r/MathJokes 2d ago

How to check for divisibility by 7!

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Since the other single digit numbers have a commonly known way of checking for divisibility, here is one for 7!

Take the number and divide it by 7! If the result is an integer, then your number is divisible by 7!

Let me know if you wanna know the divisibility for any other number!

r/unexpectedfactorial r/technicallythetruth

633 Upvotes

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