Tuesday, June 14, 2011

Divisibility Rules!

Divisibility is when a nnumber can be divided by another with no remainder or decimal.

2-
All even numbers, numbers that end in 0,2,4,6,8.

5-
All numbers that end in 0 or 5.

10
All numbers that end in 0.

Quotient - The answer to a divisibility question.
e.g. 12 divided by 2 is 6
6 is the quatient.

3-
The sum of all the digits must equal a multiple of 3.
e.g. 98 123 187
9 + 3 = 12 1 + 2 + 3 = 6 4 + 8 + 7 = 19
1 + 2 = 3 1 + 9 = 10
1 + 0 = 1


1378
1 + 3 + 6 + 8 = 19
1 + 9 = 10
1 + 0 = 1


45728163
4 + 5 + 7 + 2 + 8 + 1 + 6 + 3 = 36
3 + 6 = 9


6-
Any number that is divisible by 2 and 3.

9-
The sum of all the digits must equal 9.
e.g. 18 225 623781
1 + 8 = 9 2 + 2 + 5 = 9 6 + 2 + 3 + 7 + 8 + 1 = 27
2 + 7 = 9

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Sorry it's very late. :(

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