.1 Divisibility by 2:
A number is divisible by 2 if its unit digit is any of 0, 2, 4, 6, 8.
2. Divisibility by 3:
A number is divisible by 3 only when the sum of its digits is divisible by 3.
3. Divisibility by 9:
A number is divisible by 9 only when the sum of its digits is divisible by 9.
4. Divisibility by 4:
A number is divisible by 4 is the sum of its last two digits is divisible by 4.
5. Divisibility by 8:
A number is divisibility by 8 if the number formed by hundred’s ten’s and unit’s digit of the given number is divisible by 8.
6. Divisibility by 10:
A number is divisible by 10 only when it’s unit digit is 0.
7. Divisibility by 5:
A number is divisible by 5 only when it’s unit digit is 0 or 5.
8. Divisibility by 11:
A number is divisible by 11 if the difference between the sum of its digits at odd places and the sum of its digits at even places is either 0 or a number divisible by 11.