Which of the following numbers is divisible by 3?

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24357806

35769812

83479560

3336433

answer is C.

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Detailed Solution

A number is divisible by 3 if the sum of all digits is divisible by 3.
From option (1), we have,
Sum of all the digits of 24357806 is,

= 2 + 4 + 3 + 5 + 7 + 8 + 0 + 6 = 35

Since the number 35 is not divisible by 3, therefore the number 24357806 is also not divisible by 3.
From option (2), we have,
Sum of all the digits of 35769812 is,

= 3 + 5 + 7 + 6 + 9 + 8 + 12 = 50

Since the number 50 is not divisible by 3, therefore the number 35769812 is also not divisible by 3.
From option (3), we have,
Sum of all the digits of 83479560 is,

= 8 + 3 + 4 + 7 + 9 + 5 + 6 + 0 = 42

Since the number 42 is divisible by 3, therefore the number 83479560 is also divisible by 3.
From option (4), we have,
Sum of all the digits of 3336433 is,

= 3 + 3 + 3 + 6 + 4 + 3 + 3 = 25

Since the number 25 is not divisible by 3, therefore the number 3336433 is also not divisible by 3.
Thus, option (3) is correct.

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