which of the following numbers are divisible. by 3 or 9 (i) 3721509
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Step-by-step explanation: add all the digits of 3721509 and if the sum is divisible by 3 then the number is also divisible by 3 .
3+7+2+1+5+0+9=27
as 27 is divisible by three so the given number 3721507 is also divisible by 3.
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