 # Divisibility Rules: 2, 3, 4, 5, 6, 7, 8, 9 and 10 (3)

In this worksheet, students use their knowledge of all the divisibility rules to state by which numbers the given numbers are divisible. Key stage:  KS 3

Curriculum topic:  Number

Curriculum subtopic:  Use Concepts and Vocabulary for All Numbers

Difficulty level:   ### QUESTION 1 of 10

Instead of actually carrying out a division, it is possible to "test" a number to see if it can be divided exactly by certain numbers.

If a number divides exactly into a number, it is divisible by this number.

24 is divisible by 2, because 24 ÷ 2 is a whole number.

24 is not divisible by 5, because 24 ÷ 5 is not a whole number.

Here are the rules to test divisibility by 2, 3, 4, 5, 6, 8, 9 and 10.

Rule for 2

A number is divisible by 2 if it ends in 0, 2, 4, 6 or 8.

This means that it is even.

Rule for 3

A number is divisible by 3 if the sum of its digits is divisible by 3

3045 is divisible by 3, because 3 + 0 + 4 + 5 = 12 which is divisible by 3

3044 is therefore not divisible by 3, because 11 is not divisible by 3.

Rule for 4

A number is divisible by 4 if the number formed by its last two digits is divisible by 4.

3140 is divisible by 4, because 40 is divisible by 4.

3145 is not divisible by 4, because 45 is not divisible by 4.

Rule for 5

A number is divisible by 5 if it ends in 0 or 5.

3045 is divisible by 5, because it ends in 5.

3030 is divisible by 5, because it ends in 0.

5551 is not divisible by 5.

Rule for 6

Both the rules for 2 and 3 must work

Rule for 8

A number is divisible by 8 if the number formed by its last three digits is divisible by 8.

3240 is divisible by 8, because 240 is divisible by 8.

3145 is not divisible by 8, because 145 is not divisible by 8.

Rule for 9

This is similar to the rule for 3.

A number is divisible by 9 if the sum of its digits is divisible by 9

7065 is divisible by 9, because 7 + 0 + 6 + 5 = 18 which is divisible by 9

3045 is therefore not divisible by 9, because 12 is not divisible by 9.

Rule for 10

A number is divisible by 10 if it ends in 0.

3140 is divisible by 10, because it ends in 0.

3145 is not divisible by 10.

Example

Is 3813 divisible by 6?

Answer

No, because 3 + 8 + 1 + 3 = 15, which is divisible by 3, but it is not divisible by 2 as it ends in a 3 which is odd.

Example

Is 2153864 divisible by 4?

Answer

Yes, because 64 is divisible by 4.

By which of the given numbers is the following number divisible?

1044

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

32440

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

3405

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

121314

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

100200

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

100300

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

100800

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

123075

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

480426

2

3

4

5

6

8

9

10

By which of the given numbers is the following number divisible?

1548360

2

3

4

5

6

8

9

10

• Question 1

By which of the given numbers is the following number divisible?

1044

CORRECT ANSWER
2
3
4
6
9
• Question 2

By which of the given numbers is the following number divisible?

32440

CORRECT ANSWER
2
4
5
8
10
• Question 3

By which of the given numbers is the following number divisible?

3405

CORRECT ANSWER
3
5
• Question 4

By which of the given numbers is the following number divisible?

121314

CORRECT ANSWER
2
3
6
• Question 5

By which of the given numbers is the following number divisible?

100200

CORRECT ANSWER
2
3
4
5
6
8
10
• Question 6

By which of the given numbers is the following number divisible?

100300

CORRECT ANSWER
2
4
5
10
• Question 7

By which of the given numbers is the following number divisible?

100800

CORRECT ANSWER
2
3
4
5
6
8
9
10
• Question 8

By which of the given numbers is the following number divisible?

123075

CORRECT ANSWER
3
5
9
• Question 9

By which of the given numbers is the following number divisible?

480426

CORRECT ANSWER
2
3
6
• Question 10

By which of the given numbers is the following number divisible?

1548360

CORRECT ANSWER
2
3
4
5
6
8
9
10
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