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# Are all numbers that are divisible by 9 also divisible by 3 are all numbers that are divisible by 3 also divisible by 9 how do you know?

Updated: 9/25/2023 Wiki User

8y ago

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. Wiki User

8y ago   Earn +20 pts
Q: Are all numbers that are divisible by 9 also divisible by 3 are all numbers that are divisible by 3 also divisible by 9 how do you know?
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Still have questions?  Related questions

### All numbers divisible by 8 and 12 are also divisible by?

All numbers that are divisible by 8 and 12 would also be divisible by 4.

### All even numbers are divisible by?

Two. All numbers are also divisible by 1.

### Are all numbers divisible by 3 also by 9 give example?

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.

### How do you know if a number is divisible by 1?

All numbers are divisible by one.

no

### Are all numbers divisible by 1 also divisible by 5?

No, because 1 is not evenly divisible by 5. However, all numbers divisible by 5 are divisible by 1.

### Are all numbers divisible by 9 also divisible by 3?

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

### Are all numbers divisible by 6 also divisible by 3?

Yes, if you are referring to whole numbers.

### Can all numbers that are divisible by 5 also be divisible by 10?

No. 15 is divisible by 5.

Yes.

Yes.

### What numbers in between 676 and 706 are divisible by 5 and 10?

-- All of the numbers that end with a zero are divisible by 10.-- All of those, and all of the numbers that end with a 5, are also divisible by 5.