q18
0. By which of the following, 787878 is not divisible?
- Option : B
- Explanation : We know that a number Which is made by writing a 2-digit number 3ctimes, then the number is divisible by 7 and 13. Now, we are to check the divisibility of 11 only. Sum of digits at odd places in 787878 == 7 + 7 + 7 = 21 Sum of digits at even places in 787878 = 8 + 8 + 8.= 24 Difference =24-21= 3, which is not divisible by 11. Therefore, 787878 is not divisible by 11.
