Question

check whether the following numbers are divisible by3?​

Answer 1

Answer:

221

Given number = 221

For a number to be divisible by 3 sum of digits must be divisible by 3.

Sum of digits = 2 + 2 + 1 = 5

Since 5 is not divisible by 3, therefore 221 not divisible by 3

(ii) 543

Given number = 543

For a number to be divisible by 3 sum of digits must be divisible by 3.

Sum of digits = 5 + 4 + 3 = 12

Since 12 is divisible by 3, therefore 543 is divisible by 3.

(iii) 28492

Given number = 28492

For a number to be divisible by 3 sum of digits must be divisible by 3.

Sum of digits = 2 + 8 + 4 + 9 + 2 = 25

Since 25 is not divisible by 3, therefore 28492 is not divisible by 3.

(iv) 92349

Given number = 92349

For a number to be divisible by 3 sum of digits must be divisible by 3.

Sum of digits = 0 + 2 + 3 + 4 + 9 = 27

Since 27 is divisible by 3, therefore 92349 is divisible by 3.