1. Check whether 10800 is divisible by 40 or not?Solution:Divisibility rule of 40 :
If number is divisible by 8 and 5, then number is also divisible by 40.
Divisibility rule of 8 :
The last three digit is divisible by 8, then number is also divisible by 8.
Last 3 digit of 10800 is 800, which is divisible by 8.
`:.` 10800 is divisible by 8.
Divisibility rule of 5 :
The last digit is 0 or 5, then number is also divisible by 5.
Last digit of 10800 is 0, which is divisible by 5.
`:.` 10800 is divisible by 5.
10800 is divisible by 8 and 5.
`:.` 10800 is divisible by 40.
2. Check whether 13280 is divisible by 40 or not?Solution:Divisibility rule of 40 :
If number is divisible by 8 and 5, then number is also divisible by 40.
Divisibility rule of 8 :
The last three digit is divisible by 8, then number is also divisible by 8.
Last 3 digit of 13280 is 280, which is divisible by 8.
`:.` 13280 is divisible by 8.
Divisibility rule of 5 :
The last digit is 0 or 5, then number is also divisible by 5.
Last digit of 13280 is 0, which is divisible by 5.
`:.` 13280 is divisible by 5.
13280 is divisible by 8 and 5.
`:.` 13280 is divisible by 40.
3. Check whether 14320 is divisible by 40 or not?Solution:Divisibility rule of 40 :
If number is divisible by 8 and 5, then number is also divisible by 40.
Divisibility rule of 8 :
The last three digit is divisible by 8, then number is also divisible by 8.
Last 3 digit of 14320 is 320, which is divisible by 8.
`:.` 14320 is divisible by 8.
Divisibility rule of 5 :
The last digit is 0 or 5, then number is also divisible by 5.
Last digit of 14320 is 0, which is divisible by 5.
`:.` 14320 is divisible by 5.
14320 is divisible by 8 and 5.
`:.` 14320 is divisible by 40.
4. Check whether 11724 is divisible by 40 or not?Solution:Divisibility rule of 40 :
If number is divisible by 8 and 5, then number is also divisible by 40.
Divisibility rule of 8 :
The last three digit is divisible by 8, then number is also divisible by 8.
Last 3 digit of 11724 is 724, which is not divisible by 8.
`:.` 11724 is not divisible by 8.
Hence 11724 is also not divisible by 40.
5. Check whether 12982 is divisible by 40 or not?Solution:Divisibility rule of 40 :
If number is divisible by 8 and 5, then number is also divisible by 40.
Divisibility rule of 8 :
The last three digit is divisible by 8, then number is also divisible by 8.
Last 3 digit of 12982 is 982, which is not divisible by 8.
`:.` 12982 is not divisible by 8.
Hence 12982 is also not divisible by 40.
6. Check whether 14652 is divisible by 40 or not?Solution:Divisibility rule of 40 :
If number is divisible by 8 and 5, then number is also divisible by 40.
Divisibility rule of 8 :
The last three digit is divisible by 8, then number is also divisible by 8.
Last 3 digit of 14652 is 652, which is not divisible by 8.
`:.` 14652 is not divisible by 8.
Hence 14652 is also not divisible by 40.
This material is intended as a summary. Use your textbook for detail explanation.
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