unicorn2521 unicorn2521

03-11-2019
Mathematics

contestada

Is the following conditional true?
If an integer is divisible by 9, then its digits add up to 9.
yes
no

Respuesta :

taylorbb taylorbb

03-11-2019

Yes

Explanation:
2x9=18 and 1+8=9

The pattern repeats

Answer Link

anastasiaandu1p689tu anastasiaandu1p689tu

03-11-2019

Yes, it is true. Ex. 3 x 9 = 27, 2 + 7 = 9.

If you happen to have a larger number say, 639, you might have to add the digits together multiple times before you have your answer so, 6 + 3 + 9 = 18, then 1 + 8 = 9, so it is divisible by 9.

Answer Link

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