Which of The Following Numbers is Not Divisible by 3?

  1. 3604218
  2. 1872516
  3. 1530729
  4. 3954278
Harsh Vardhan Professor Asked on 6th September 2015 in Maths.
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1 Answer(s)

Answer: (4) 3954278

Explanation:-
Divisibility of 3 :-
If the sum of the digits of the number is divisible by 3, that number is divisible by 3.

Then, the sum of digits of 3604218 = 3 + 6 + 0 + 4 + 2 + 1 + 8
= 24, 24 is the divisible by 3 then, the number is divisible by 3.

Then, the sum of digits of 1872516 = 1 + 8 + 7 + 2 + 5 + 1 + 6
= 30, 30 is divisible by 3 then, the number is divisible by 3.

Then, the sum of the digits of 1530729 = 1 + 5 + 3 + 0 + 7 +  2 + 9
= 27, 27 is divisible by 3 then, the number is divisible by 3.

Then, the sum of digits of 3954278 = 3 + 9 + 5 + 4 + 2 + 7 + 8
= 38, 38 is not divisible by 3 then, the number is not divisible by 3.

Hence, the answer is (4) 3954278.

Anurag Mishra Professor Answered on 8th September 2015.
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