Question

write number less than 100 which are common multiples of 4 and5​

Answer 1

20,40,60 and 80

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Answer 2

The numbers less than 100 which are common multiples of 4 and 5 are 20, 40, 60, and 80.

Given,

The numbers 4, 5 and 100.

To Find,

All the numbers less than 100 which are common multiples of 4 and5​

Solution,

The method of finding the numbers less than 100 which are common multiples of 4 and 5 is as follows -

We know that the multiples of 4 are - 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100,...

We know that if a number is divisible by 5, the unit place of that number will be either 0 or 5.

So the multiples of 4 whose unit place is either 0 or 5 are - 20, 40, 60, 80.

Hence, the numbers less than 100 which are common multiples of 4 and 5 are 20, 40, 60, and 80.

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