Divisibility tricks

QUICK DIVISIBILITY TRICKS

Divisibility by 2: 

If last digit of the number is even i.e. 0,2,4,6,8
Ex : 876999578 is divisible by 2.

Divisibility by 3: 

If the sum of digits is divisible by 3.
Ex: 327 is divisible by 3, since sum of its digits = (3+2+7) = 12, which is divisible by 3.

Divisibility by 5: 

If the last digit of the number ends with 0 or 5.
Ex: 20870 ends in a 0, so it is divisible by 5.

Divisibility by 6: If the number is divisible by both 2 & 3.
Ex: 558 is divisible by 6, because it is divisible by 2(number is even) as well as 3 (5+5+8=18,which is divisible by 3).

Divisibility by 9: 

If the sum of the digits is divisible by 9.
Ex: 672381 is divisible by 9, since sum of digits = (6+7+2+3+8+1) = 27 is divisible by 9.

Divisibility by 10: 

If the digit at units place is 0 it is divisible by 10.
Ex: 697420, 243540 is divisible by 10.