|| Divisibility Test
|2||The ones digit is 0, 2, 4, 6 or 8. In other words the number should be an even number.|
|3|| The sum of the digits is divisible by 3.
231 = 2 + 3 + 1 = 6, 6 is divisible by 3.
So 231 is divisible by 3.
|5|| The ones digit is 0 or 5
Here ones digit is zero
So 120 is divisible by 5.
|7||Double the ones digit and subtract that from the sum of the rest of the digits.Repeat the procedure till a two digit number is arrived. If the two digit number got is divisible by 7, then the given number is divisible by 7.
|11||Subtract the sum of the digits in odd places from the sum of the digits in the even places. If the difference obtained is 0 or divisible by 11, then the given number is divisible by 11.|