Divisibility by 18

In this topic divisibility by 18 first let us see the definition. All the numbers which are divisible by 2 and divisible by 9 are divisible by 18.

Example 1:

Check whether 1458 is divisible by 18. To check whether the given number is divisible by 18 or not first we have to check it is divisible by 2 and then we have to check it is divisible by 9.If the given number is divisible by both 2 and 9.Then we can say it is divisible by 18.Here consider the numbers 1458 to check whether it is divisible by 2.Here the given number 346 is the even number.So we can say it is divisible by 2.To check whether it is divisible by 9 need to calculate the sum of the digits that is 1 + 4 + 5 + 8 = 18

Divisibility by 18 Divisibility by 18

So it is divisible by 2.To check whether 1458 is divisible by 9 we need to calculate the sum of the digits that is 1 + 4 + 5 + 8 = 18 it is divisible by 9. So the whole number 1458 is divisible by 9.

Therefore we can say the given number 1458 is divisible by 18.

In the following worksheet you can find 5 questions in the form of quiz and you can get direct answers too.

Example 2:

Check whether 346 is divisible by 18. To check whether the given number is divisible by 18 or not first we have to check it is divisible by 2 and then we have to check it is divisible by 9.If the given number is divisible by both 2 and 9.Then we can say it is divisible by 18.Here the given number 346 is the even number.So we can say it is divisible by 2.Next we need to check whether it is divisible by 9.For that we have to calculate the sum of the digits that is 3 + 4 + 6 = 13

Here 13 is not divisible by 9.So we can say the given number 346 is not divisible by 18.