Do I need to memorize divisibility tests

Hi.

Does Greg recommend memorizing divisibility tests?

For example, if I want to know whether a certain large number is divisible by another number or not, are such tests needed in the real GRE?

Thanks.

P.S. I know this can be done on the calculator. However, there are some problems where calculator doesn’t help.

Hi, I would suggest you be aware of the divisibility test for 3,7,9,11 (not forgetting the easy ones: 2, 4,5, and 6) as most of the questions revolve around them.

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