If the sum of the digits of a given number equals nine or a multiple of nine, nine is a factor of that number.
If that is the case, then three is a factor of the original number.
No number satisfies all of those conditions.
No factor of 9 has three digits. 450 is a three-digit multiple of 150 (and of 9) with a digit sum of 9.
If the last two digits of your target number are a multiple of 4, 4 is a factor of the whole number.
Add up the digits of the given number. If they total a multiple of three, the number has three as a factor.
No. To find if a number is a factor of 3, add the number's digits. If the resulting number is a multiple of 3, then the original number is a multiple of 3. In 4339, the digits of the number added together is 19, which is not a multiple of 3.
450 or 900
The number is 35.
If you add all the digits up, and the total equals a number that 3 can go in, then it's a factor of 3.
189 is a composite. Some quick tests, which can be done in your head: Check if the number is even (2 is a factor). Ones place will have 0,2,4,6, or 8 if even. Multiple of 5 (5 is a factor): Ones digit is 0 or 5. Multiple of 3 or 9: Add up the digits in the number; if this sum is 3 or a multiple of 3, then the original number is a multiple of 3 (3 is a factor). Additionally, if this sum equals 9 or a multiple of 9, then 9 is a factor. This is the case for 189 : 1+8+9=18, which is a multiple of 9. Since we found a factor (in addition to 1 & the original number) then the number is composite and not prime.
21 or 35
24 divided by three equals 8 divided by four equals 6 2 plus 4 equals 6
I think you might mean "multiple." If the sum of a number's digits is a multiple of 9, the original number is as well. If you want to know how you know if a number is a factor of 9, memorize the numbers 1, 3 and 9.
A factor is what goes into a number, a multiple is what a number goes into. 3 is a factor of 9 27 is a multiple of 9.
No. A number cannot be both a factor and a multiple of another number. A number can be multiple and factor of itself, but nothing else.
No. A factor goes into a number. A number goes into a multiple. They have an inverse relationship in the sense that if A is a multiple of B, then B is a factor of A.