How many times can you subtract 10 from 31?

"How many times can you subtract 10 from 31?" is a tricky question. We think that there are three different answers to this question.

Answer 1: Once
It is once, because after you subtract 10 from 31 once, you are left with 21. Thus, you cannot subtract 10 again from 31.

Answer 2: 3.1 times
3.1 times, because 31 divided by 10 is 3.1. After you subtract 10, 3.1 times from 31, then there is nothing left to subtract from.

Answer 3: Infinite
There is nothing that says you can't keep subtracting 10 from 31 indefinitely. Just because you will end up with negative numbers doesn't mean you have to stop subtracting!

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