Divisibility Rules
2:  Is it even? 

Yes

No
24
2:  Is it even? 

Yes

No

35

2:  Is it even? 

Yes

No

144

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

3 + 5 =

Is it divisible by 3?

Yes

No

35

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

4 + 8 =

Is it divisible by 3?

Yes

No

48

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

4 + 5 =

Is it divisible by 3?

Yes

No

45

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

2 + 7 =

Is it divisible by 3?

Yes

No

27

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

4 + 2 =

Is it divisible by 3?

Yes

No

42

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

1+2+3 =

Is it divisible by 3?

Yes

No

123

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

5 + 1 =

Is it divisible by 3?

Yes

No

51

3:  sum-of-the-digits divisble by 3?  (Add up the digits

before deciding.

2 + 1 =

Is it divisible by 3?

Yes

No

21

5:  ends in a 5 or zero

Is it divisible by 5?

Yes

No

35

5:  ends in a 5 or zero

Is it divisible by 5?

Yes

No

120

5:  ends in a 5 or zero

Is it divisible by 5?

Yes

No

42

5:  ends in a 5 or zero

Is it divisible by 5?

Yes

No

50

5:  ends in a 5 or zero

Is it divisible by 5?

Yes

No

24

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