Why is 453 a number divisible by 3 and not 2?

Answer 1

Because when you divide 453 by 3, you get a whole number (a number that doesn't have a decimal or fraction) which comes out to be 151. However, when you divide 453 by 2, you get 226.5 or 226 1/2. Since this is not a whole number it is not divisible by 2. Anything divisible by 2 will end with and even number(2, 4, 6, 8, or 0(this does exclude 0 itself)) Divisibility does have rules to help

If the number is divisible by:

2 - it will end with an even number

3 - the sum of the digits will be a multiple of 3

4 - the last 2 digits will be a multiple of 4

5 - the number will end with a 5 or 0(excluding 0 again)

6 - the number is divisible by 2 and 3

7 - I haven't found any trick for 7 =( sorry

8 - the last 3 digits are divisible by 8

9 - the sum of the digits are a multiple of 9

10 - the number ends with 0(excluding 0)

Of course you could divide all of these on a calculator but here are some tricks to help.

Hope this helped =)