Divisibility by 40, Shortcuts, Tips, Funny Math

Divisibility by 40

Here we have mentioned few shortcuts/tips to find out the number is divisible by 40.

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Divisibility by 40

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Divisibility by 40:
How to check a number is divisible by 40?
It is very simple, check the number is divisible by 5 and 8, if it is divisible by both, then clearly the number is divisible by 40.

Examples:
Is the number 31948541800 divisible by 40?
First check the number is divisible by 5,
Check the units digit in the given number.
unit digit is 0, so the number is also divisible by 5.
Then check the number is divisible by 8 also,
The last three digit of the number is 800.
800 is divisible by 8, so the number is also divisible by 8.
The number 31948541800 is divisible both by 5 and 8, so it is divisible by 40.

Is the number 745413930 divisible by 40?
Check the units digit in the given number.
unit digit is 0, so the number is also divisible by 5.
Now check the number is divisible 8 also,
The last three digit of the number is 930.
930 is not divisible by 8, so the number is not divisible by 8
The number 745413930 is divisible only by 5 and not by 8, so it is not divisible by 40.

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This is a funny tricky play of maths. Checking Divisibility by 40 is made easier from the above shortcuts/tips. Enjoy it with Fun!