Divisibility by 80, Shortcuts, Tips, Funny Math

Divisibility by 80

Here we have mentioned few shortcuts/tips to find out the number is divisible by 80.

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Divisibility by 80

Divisibility by 80:
How to check a number is divisible by 80?
It is very simple, check the number is divisible by 5 and 16, if it is divisible by both, then clearly the number is divisible by 80.

Examples:
Is the number 57070729840 divisible by 80?
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 16 also,
The last four digits of the number is 9840.
9840 is divisible by 16, so the number is also divisible by 16.
The number 57070729840 is divisible both by 5 and 16, so it is divisible by 80.

Is the number 942132830 divisible by 80?
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 by 16 also,
The last three digit of the number is 2830.
2830 is not divisible by 16, so the number is not divisible by 16
The number 942132830 is divisible only by 5 and not by 16, so it is not divisible by 80.

Prev: Divisibility by 40

This is a funny tricky play of maths. Checking Divisibility by 80 is made easier from the above shortcuts/tips. Enjoy it with Fun!