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Q: Why are all the numbers divisible by 9 divisible by 3?

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All numbers divisible by 3 are NOT divisible by 9. As an example, 6, which is divisible by 3, is not divisible by 9. However, all numbers divisible by 9 are also divisible by 3 because 9 is divisible by 3.

Yes; all numbers that are divisible by 9 are divisible by 3.

All numbers divisible by 9 are divisible by 3; since 9 = 3 x 3 all multiples of 9 are also multiples of 3. However, all numbers divisible by 3 are not divisible by 9, eg 6 = 2 x 3 but 6 is not divisible by 9 (since 6 is not a multiple of 9) - it only takes one counter example to disprove a theory.

Yes. Test a couple numbers divisible by 9--27, 81--and they are all divisible by 3.

The numbers 2, 3, and 9 are all divisible by 1.

A number is divisible by 9 if all the digits add up to 9 or are a factor of. IF the digits add up to 9 (or a factor of 9), they will automatically be a factor of 3.Yes. Test a couple numbers divisible by 9--27, 81--and they are all divisible by 3.

1350 is divisible by all of the numbers of 3, 6 and 9

No. It is the other way round.

yes because 3 fits in 9 perfectly

yEAH, i THINK SO

All numbers divisible by 90 are also divisible by 9 and 10

They are infinite.

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