Flashcards in Divisibility Rules Deck (11):

1

## 2

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The last digit is even (0,2,4,6,8)

Example

128 is divisible by 2

2

## 3

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The sum of the digits is divisible by 3

Example

381 = 3+8+1 = 12

3

## 4

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The last 2 digits are divisible by 4

Example

1312 is divisible by 4

4

## 5

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The last digit is 0 or 5

Example

10, 25 end in 0 or 5

5

## 6

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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

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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

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The last three digits are divisible by 8

Example

109816 = last 3 digits = 816 can be divided by 8 = YES

8

## 9

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The sum of the digits is divisible by 9

Example

1629 = 1+6+2+9 = 18, 18/9 = 2 YES

9

## 10

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The number ends in 0

Example

10, 50, 100

10

## 11

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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