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Flashcards in Divisibility Rules Deck (11):
1

2

The last digit is even (0,2,4,6,8)
Example
128 is divisible by 2

2

3

The sum of the digits is divisible by 3
Example
381 = 3+8+1 = 12

3

4

The last 2 digits are divisible by 4
Example
1312 is divisible by 4

4

5

The last digit is 0 or 5
Example
10, 25 end in 0 or 5

5

6

The number is divisible by both 2 and 3
Example
138 Even (Divisible by 2)
and 1+3+8=12 (12/3=4) (Divisible by 3)

6

7

If you double the last digit and subtract it from the rest of the number and the answer is:0 or 7
Example
672 (double 2 =4, 67-4=63 and 63/7=9) YES

905 (double 5=10, 90-10=80, and 80/7=113/7) NO

7

8

The last three digits are divisible by 8
Example
109816 = last 3 digits = 816 can be divided by 8 = YES

8

9

The sum of the digits is divisible by 9
Example
1629 = 1+6+2+9 = 18, 18/9 = 2 YES

9

10

The number ends in 0
Example
10, 50, 100

10

11

If you sum every second digit and then subtract all other digits and the answer is: 0 or 11
Example
3729 (7+9) - (2+3) = 11 YES

11

12

The number is divisible by both 3 and 4 Example
648 (6+4+8 = 18 = divisible by 3 =YES)
and
48 divisible by 4 = YES