Divisibility rules

Quote : MATHEMATICS is a great motivator for all humans.. Because its career starts with "ZERO" but it never end
 
Worked on sufficient multiplication examples and square of a number examples. Lets look into the division operation. In simplification every operation(addition or subtraction or multiplication and division) is very important.

How can you say whether a number "x" is divisible by a number "y"?

x can be any number and y is between 1 to 11 ( for simplicity purpose )




Lets look at divisibility rules.

How can you say whether a number is divisible by 2 or 5 or 10?

This is very simple. 
If unit place digit of the number is 0, 2, 4, 6 and 8, it can be divisible by 2.
If unit place digit of the number is 0 or 5, it can be divisible by 5.
If unit place digit of the number is 0, it can be divisible by 10. 

Ex : Is 1032 divisible by 2?
In the above example unit place digit is 2. So it is divisble by 2 and it is not divisible by 5 or 10.

Irrespective of magnitude of the number, just look at unit place digit to decide whether the number is divisible by 2 or 5 or 10.

Try following examples.
 1) 1025
 2) 10000000025
 3) 1111111111111111111111111111111111112
 4) 5555555555555555555555555550