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How do you know when a number is divisible by 2?

Updated: 8/21/2019
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8y ago

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Look at the last digit (the ones, or units, digit) of the number:

* if it is even, ie one of the digits {0, 2, 4, 6, 8}, then the number is divisible by 2; otherwise

* it is an odd number, ie one of {1, 3, 5, 7, 9}, and the number is not divisible by 2.

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Q: How do you know when a number is divisible by 2?
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