How many times can you subtract 10 from 15?

"How many times can you subtract 10 from 15?" 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 15 once, you are left with 5. Thus, you cannot subtract 10 again from 15.

Answer 2: 1.5 times
1.5 times, because 15 divided by 10 is 1.5. After you subtract 10, 1.5 times from 15, then there is nothing left to subtract from.

Answer 3: Infinite
There is nothing that says you can't keep subtracting 10 from 15 indefinitely. Just because you will end up with negative numbers doesn't mean you have to stop subtracting!

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