Q. 2003.7( 7 Votes )

Using divisibility test. determine which of the following numbers are divisible by 9

(a) 672

(b) 5652

Answer :

(a) A number is divisible by 9 if sum of its digits is divisible by 9.


Sum of digits 0f 672 = 6 + 7 + 2 = 15


15 is not divisible by 9


Hence 672 is not divisible by 9.


(b) A number is divisible by 9 if sum of its digits is divisible by 9.


Sum of digits 0f 5652 = 5 + 6 + 5 + 2 = 18


18 is divisible by 9


Hence, 5652 is divisible by 9.


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