20 . 2+0 = 2
20 divided by 2 makes 10.
Is the same for 30,40,50,60,70,80 and 90.
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the sum of my digits is 6? answer=60
If the sum of its digits add up to 9 then it is divisable by 9
Add the digits together. The sum of the digits of 23 is 5.
No it is not. To check - add all the digits together (in this case 2+6+9=17. If the sum of the digits can be divided exactly by 3, then the number itself will also divide by 3. In this case, 17 (the sum of the digits) does not divide exactly by 3.