Question

Using the divisibility test, determine $5445$ is divisible by $11$ or not?

Answer 1

Checking the divisibility by $11$:

Divisibility test for $11$: 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 divisible by $11$.

Consider the number $5445$

Sum of the digit at odd places $=5+4=9$

Sum of the digit at even places $=4+5=9$

The difference $=9-9=0$ which is divisible by $11$.

Therefore, the number $5445$ is divisible by $11$.