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Q: Is a 2digit number the two digits differ by3 the numbers square root isa single digit the number has 3 as a factor?

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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.

5 is a factor of any whole number ending in 5; it is also a factor of any whole number of 2 or more digits ending in zero.

Any multiples of 13 that differ by 13.

Use some rules, then just guess. All even numbers have 2 as a factor. All numbers ending in 0 or 5 have 5 as a factor. Add all the digits, if that is divisible by 3 or 9 then the original number will also have 3 or 9 as a factor. If you know a list of squares, then (in your head) compare to the number you have.

This cannot be determined based on the number you provided. You must have at least two whole numbers to determine a greatest common factor. Leave a space between the digits if you want to specify two or more numbers.

This cannot be determined based on the number you provided. You must have at least two whole numbers to determine a greatest common factor. Leave a space between the digits if you want to specify two or more numbers.

This cannot be determined based on the number you provided. You must have at least two whole numbers to determine a greatest common factor. Leave a space between the digits if you want to specify two or more numbers.

You can not factor prime numbers, that is why they are prime numbers

114 beacause it's three digits a factor of seven even

65

Any multiples of 5 that differ by 5, like 45 and 50 or 120 and 125.