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Number Theory

Divisibility

Divisibility Warmup

         

Is 123 divisible by 3?

True or False?

Since 2 is even, it is not a prime.

Is 123456 a multiple of 6?

True or False?

A number is a multiple of 3 if and only if the units digit is 3, 6 or 9.

Is 12345 a multiple of 5?

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