Question

Using the divisibility test, determine $201853$ is divisble 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 $201853$

Sum of the digit at odd places = $3+8+0=11$

Sum of the digit at even places = $5+1+2=8$

The difference = $11-8=3$

Then, the number $201853$ is not divisible by $11$.