Divisibilty Test

In class we learned how to find divisible numbers between 2-11

By 2. A number is divisible by 2 if the ones digit is divisible by 2
example: 3,846,711,439,28(4) / 2 = Divisible by 2

By 3 or 9. A number is divisible by 3 or 9 if the sum of the digits is divisible by 3 or 9
example: 3,846,711,4(39),284 / 3 = Divisible by 3 the sum of its digit is 60...... 60 / 3 = 20
example: 3,846,711,439,284 / 9 =  Not divisible by 9..... 60 / 9 = 6.6666

By 4. A number is divisible by 4 if the last two digits are divisible by 4
example: 3,846,711,439,2(84) / 4 = Divisible by 4

By 5. A number is divisible by 5 if the ones digit is a 5 or 0
example: 3,846,711,439,28(4) / 5 = Not divisible by 5 b/c no 0 or 5 in the ones place

By 6. A number is divisible by 6 if its divisible by both 2 and 3
example: 3,846,711,439,284 / 6 = Divisible by 6 b/c up we have proven that 2 and 3 is divisible

By 7. A number is divisible by 7 if you can group up the numbers and if they are divisible by 7 or 11
example: (003),846,(711),439,(284) / 7 = Divisible by 7........... 287 / 7 = 41
                                                                 Not divisible by 11...... 287 / 11 = 26.09                       
  003                    846                           1285 - 998 = 287
  711                 + 439 = 1285
+284 = 998

By 8. A number is divisible by 8 if the last three digits are divisible by 8
example: 3,846,711,439,(284) / 8 = Not divisible by 8..... 284 / 8 = 35.5

Here is the link to show you the divisiblility rules 1-10. And if you don't understand what was typed up top.

http://www.mathgoodies.com/lessons/vol3/divisibility.html

ENJOY!!!!!