*This Math quiz is called 'Verbal Reasoning - Complete the Sum 4' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.*

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What you are doing in this series of quizzes is basic algebra, where a symbol stands in for a number. We hope that when you begin algebra later on in school you will be ahead of the game.

If you haven't already played our first three quizzes in this series, please do go back and play them first. Only when you have got 40 out of 40 will you be a whizz at math!

Example:

26 + 7 = 18 + ?

13

14

15

16

Answer: 15

This is because 26 + 7 = 33. 18 + ? = 33. This makes 15 the only possible answer.

26 + 7 = 18 + ?

13

14

15

16

Answer: 15

This is because 26 + 7 = 33. 18 + ? = 33. This makes 15 the only possible answer.

1.

Find the number that will complete the sum below correctly.

27 - 13 = 42 ÷ ?

27 - 13 = 42 ÷ ?

5

6

4

3

This is because 27 - 13 = 14. 42 ÷ 3 is also equal to 14. The first three square numbers are 1, 4 and 9. 14 is the sum of these square numbers

2.

Find the number that will complete the sum below correctly.

63 ÷ 9 = 32 - ?

63 ÷ 9 = 32 - ?

24

25

26

27

This is because 32 - 25 = 7 and 63 ÷ 9 = 7

3.

Find the number that will complete the sum below correctly.

4 x 16 = ? - 55

4 x 16 = ? - 55

78

117

119

55

This is because 119 - 55 = 64, which is the same as 4 x 16. That was one to get your brain working a little harder! Did it work, or are you an expert at these questions now?

4.

Find the number that will complete the sum below correctly.

79 + ? = 9 x 9

79 + ? = 9 x 9

2

4

7

9

This is because 9 x 9 = 81. To get to this product from 79 we have to add 2

5.

Find the number that will complete the sum below correctly.

56 ÷ 8 = ? - 8

56 ÷ 8 = ? - 8

13

19

17

15

This is because 56 ÷ 8 = 7. This is the same as 15 - 8. A cubed number is a number multiplied by itself and then by itself again (for example, 3 x 3 x 3 = 27, making 27 the cube of 3 and 3 the cube root of 27). Can you work out the cube root of 8? Read below for the answer

6.

Find the number that will complete the sum below correctly.

39 ÷ 3 = ? - 18

39 ÷ 3 = ? - 18

13

33

31

18

This is because 39 ÷ 3 = 13, which is equal to 31 - 18

7.

Find the number that will complete the sum below correctly.

? - 45 = 8 x 4

? - 45 = 8 x 4

77

75

73

71

This is because 77 - 45 = 32 and 8 x 4 = 32. Remember the challenge we set you in question 5? Did you work out that the cube root of 8 is 2?

8.

Find the number that will complete the sum below correctly.

72 - 14 = ? x 2

72 - 14 = ? x 2

28

26

27

29

This is because 29 x 2 = 58. Also, 72 - 14 = 58

9.

Find the number that will complete the sum below correctly.

? ÷ 13 = 90 ÷ 18

? ÷ 13 = 90 ÷ 18

67

66

65

69

This is because 90 ÷ 18 = 5 and 65 ÷ 13 = 5. Only 65 works. On a dartboard scoring a double 18 and a treble 18 results in a score of 90. What would a treble and a double 19 score? Read below for the answer

10.

Find the number that will complete the sum below correctly.

27 x 3 = 9 x ?

27 x 3 = 9 x ?

11

7

8

9

This is because 27 x 3 = 81 and 9 x 9 also equals 81. The answer to the little quiz in question 9 is 95 (19 x 3 = 57 and 19 x 2 = 38. 57 + 38 = 95). We hope you enjoyed this series of quizzes, and look forward to you trying the next series of Verbal Reasoning quizzes!