Because all the digits of 7155 add up to 9:
7+1+5+5 = 18 and 1+8 = 9
7155/9 = 795
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The number 1,431 is divisible by all multiples of 1,431 (which are infinite), including: 1431, 2862, 4293, 5724, 7155, 8586, 10017, 11448 . . .
NO. 1110 is not divisible by 9. A number is divisible by 9 if the sum of its digits is divisible by 9. 1110 = 1 + 1 + 1 + 0 = 3 (3 is not divisible by 9, thus, 1110 is not divisible by 9.)
No it is not divisible by 9 .
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.
9 is divisible by both 3 and 9