Question

Using divisibility tests, determine if the given number is divisible by $11$ :

$901153$

Answer 1

Rule for Divisibility by $11$ :

A whole number is divisible by $11$ if the difference between the sums of digits in even and odd positions is a multiple of $11$.

Here the given number is $901153$ .

The sum of the digits at even places is $5+1+9=15$.
The sum of the digits at odd places is $3+1+0=4$.
Difference between the sum of the digits at the even and odd places $\Rightarrow 15–4=11$
The difference between the sum of the digits at odd and even places is $11$, which is a multiple of $11$.

Hence, $901153$ is divisible by $11$.