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271.11
2,430 is already divisible by 9, and needs no help from another digit.
A number is divisible by 9 if a whole number of 9s can go into it and leave no remainder.
Neither 3 nor 71 are divisible by 9 and nothing will make them so.
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.)