If

So, if the difference is 0, 11, 22, 33, ….

Then, Number is divisible by 11

##
**
Is 308 divisible by 11?
**

**
**

Sum of digits at odd Places = 8 + 3 = 11

Sum of digits at even Places = 0

Difference = 11 − 0 = 11

Since 11 is divisible by 11

∴ 308 is
**
divisible
**
by 11

##
**
Is
**
**
1331
**
**
divisible by 11?
**

Sum of digits at odd Places = 1 + 3 = 4

Sum of digits at even Places = 3 + 1 = 4

Difference = 4 − 4 = 0

Since difference is 0

∴ 1331 is
**
divisible
**
by 11

##
**
Is
**
**
61809 divisible
**
**
by 11?
**

Sum of digits at odd Places = 9 + 8 + 6 = 23

Sum of digits at even Places = 0 + 1 = 1

Difference = 23 − 1 = 22

Since 22 is divisible by 11

∴ 61809 is
**
divisible
**
by 11

## Is 5081 divisible by 11?

Sum of digits at odd Places = 1 + 0 = 1

Sum of digits at even Places = 8 + 5 = 13

Difference = 13 − 1 = 12

Since 12 is not divisible by 11

∴ 5081 is
**
not divisible
**
by 11