Question

Using divisibility test, determine whether the number 31790012 is divisible by 11 or not. ​

Answer 1

Answer:

no........................t

Answer 2

Answer:

Take the alternating sum of the digits in the number, read from left to right. If that is divisible by 11, so is the original number.

3-1+7-9+0-0+1-2

2+7-9+0-0+1-2

10-9+0-0+1-2

1+1-2

2-2

0 ans .

As the difference between the sum of the digits at odd places and the sum of the digits at even places is O, therefore, 31790012 is divisible by 11.