Question

Using divisibility test, determine whether $7138965$ is divisible by $11$ or not.

Answer 1

RULE: 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.

$7-1+3-8+9-6+5=24-15=9$

Since, 9 is not divisible by 11 so the Given number is not divisible by 11