Instructions

Following questions are based ,on the lice three digit numbers given below :
591 462 318 675 924

Question 188

If one is added to the third digit of each of the numbers, how many numbers thus formed will be divisible by three?

Solution

NOTE :- For a number to be divisible by 3, sum of its digits should also be divisible by 3.

After adding 1 to the third digit of each of the numbers, the arrangement will be :

592 = 5+9+2 = 16 [not divisible by 3]

463 = 4+6+3 = 13 [not divisible by 3]

319 = 3+1+9 = 13 [not divisible by 3]

676 = 6+7+6 = 19 [not divisible by 3]

925 = 9+2+5 = 16 [not divisible by 3]

So, none of the new numbers is divisible by 3

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