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Mathematics 9 Online
OpenStudy (anonymous):

What is the unit digit of 24! I WILL give medals:)

OpenStudy (primeralph):

First from the right.

OpenStudy (anonymous):

Does anyone think there is another way of doing it than just calculating the whole thing like: 24 times23times22 etc?

OpenStudy (anonymous):

A shortcut maybe?

OpenStudy (primeralph):

Unit digit? That means the first digit.

OpenStudy (anonymous):

That means the ones place

OpenStudy (anonymous):

srry about the inconvenience:(

OpenStudy (jdoe0001):

hmm, did you mean factorial 24?

OpenStudy (anonymous):

yup

OpenStudy (jdoe0001):

ahh

OpenStudy (jdoe0001):

well, ahemm, there's a longer way, yeah, the addition way, but that'd be longer

OpenStudy (primeralph):

There are other way, but they require more math skills. The fastest is a calculator.

OpenStudy (primeralph):

*ways

OpenStudy (anonymous):

Do you know the other ways?

OpenStudy (primeralph):

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