Can It Be Divided By 11?

To be able to decide whether a number can be divided by 11, we need to understand this multiply by 11 concept first.

Click here to review the x 11 mental concept.

It is simply to do the reverse process of the mental multiplication by 11.

Example: Can the number 352 be divided by 11?

Looking at the centre digit, we can deduce that it is the addition of the 2 extreme digits.
As such the number 352 can be divided by 11.

Example: How about 3751 ?

Again, looking at the digit 3 and 7, we can see that their subtraction produces 7-3 = 4.
For the other 2 digits of 5 and 1, their subtraction also results in 5- 1 = 4.
This means that the number 3751 can be divided by 11 (based on the mental multiplication by 11).

Example: How about 542 ?

The centre digit should be 5 - 2 = 3 to be divisible by 11.
Therefore the number 542 can be quickly deduced not able to be divided by 11.

Check other divisibility concept by clicking the link here.

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