Question

Using the divisibility test, determine $45621587$ is divisible by $11$ or not?

Answer 1

Divisibility of $11$: A number is divisible by $11$, if the difference between the sum of the digits at even places and the sum of the digits at odd places(starting from the ones place) is $0$, or divisible by $11$.

Consider the number $45621587$

Sum of the digit at odd places = $5+2+5+7=19$

Sum of the digit at even places = $4+6+1+8=19$

The difference = $19-19=0$

Then, the number $45621587$ is divisible by $11$ .

Thus, $45621587÷11=4147417$