Question

Which of the following numbers is NOT divisible by 11.

• A. 536536
• B. 8378432
• C. 110110
• D. 758043

Answer 1

The correct option is B 8378432

Any three-digit number written two times to make a 6-digit number is divisible by 11.
So, 536536 and 110110 is divisible by 11.
In 758043, difference between sum of digits at odd and even places is 19 – 8 = 11.
So, 758043 is divisible by 11.
In 8378432, difference between sum of digits at odd and even places is 21 – 14 = 7. So, 8378432 is not divisible by 11.