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In this quiz the numbers in each group are related in the SAME way. Find the missing number and select the correct answer from the four choices available. The number you are looking for each time is missing from the square brackets [ ]. The sums might be multiply, divide, add or subtract, and the best way to work them out is to see what operation was carried out in the first two bracketed series, and do the same to the one with the missing number. An example has been done for you.

Example:

(12 [4] 48), (19 [6] 114), (12 [ ? ] 36)

3

4

5

6

The correct answer is 3.

This is because 12 and 48 are related by dividing 48 by 12 to get the number in the middle. 19 is related to 114 in the SAME way (dividing 114 by 19 results in 6). The relationship is DIVIDE.

(12 [4] 48), (19 [6] 114), (12 [ ? ] 36)

3

4

5

6

The correct answer is 3.

This is because 12 and 48 are related by dividing 48 by 12 to get the number in the middle. 19 is related to 114 in the SAME way (dividing 114 by 19 results in 6). The relationship is DIVIDE.

1.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(82 [56] 26), (29 [16] 13), (78 [?] 29)

Choose the correct answer from the four choices available.

(82 [56] 26), (29 [16] 13), (78 [?] 29)

94

44

49

99

82 and 26 are related by subtracting 26 from 82 to get the number in the middle. 29 is related to 13 in the SAME way (subtracting 13 from 29 results in 16). 78 - 29 = 49. The relationship is SUBTRACT

2.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(72 [8] 9), (64 [4] 16), (48 [?] 12)

Choose the correct answer from the four choices available.

(72 [8] 9), (64 [4] 16), (48 [?] 12)

6

4

8

10

72 and 9 are related by dividing 72 by 9 to get the number in the middle. 64 is related to 16 in the SAME way (dividing 64 by 16 results in 4). 48 ÷ 12 = 4. The relationship is DIVIDE. 48 is the smallest number we have which can be divided by 10 different numbers: 1, 2, 3, 4, 6, 8, 12, 16, 24 and of course, 48 itself

3.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(39 [27] 12), (65 [47] 18), (28 [?] 9)

Choose the correct answer from the four choices available.

(39 [27] 12), (65 [47] 18), (28 [?] 9)

9

119

29

19

39 and 12 are related by subtracting 12 from 39 to get the number in the middle. 65 is related to 18 in the SAME way (subtracting 18 from 65 results in 47). 28 - 9 = 19. The relationship is SUBTRACT

4.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(119 [76] 43), (38 [13] 25), (87 [?] 29)

Choose the correct answer from the four choices available.

(119 [76] 43), (38 [13] 25), (87 [?] 29)

5

8

58

85

119 and 43 are related by subtracting 43 from 119 to get the number in the middle. 38 is related to 25 in the SAME way (subtracting 25 from 38 results in 13). 87 - 29 = 58. The relationship is SUBTRACT. 58 is a very interesting number, as it is the sum of the first 7 prime numbers (not counting 1):
2 + 3 + 5 + 7 + 11 + 13 + 17, and is also the number of letters in the longest named village in Wales (Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch). Try saying that after a few quizzes have addled your brain!

5.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(84 [100] 16), (94 [111] 17) (68 [?] 26)

Choose the correct answer from the four choices available.

(84 [100] 16), (94 [111] 17) (68 [?] 26)

94

90

98

92

84 and 16 are related by adding 84 to 16 to get the number in the middle. 94 is related to 17 in the SAME way (adding 94 to 17 results in 111). 68 + 26 = 94. The relationship is ADD

6.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(59 [97] 38), (47 [58] 11), (68 [?] 18)

Choose the correct answer from the four choices available.

(59 [97] 38), (47 [58] 11), (68 [?] 18)

88

66

86

68

59 and 38 are related by adding 59 to 38 to get the number in the middle. 47 is related to 11 in the SAME way (adding 47 to 11 results in 58). 68 + 18 = 86. The relationship is ADD

7.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(28 [4] 7), (144 [12] 12), (92 [?] 23)

Choose the correct answer from the four choices available.

(28 [4] 7), (144 [12] 12), (92 [?] 23)

400

44

4

40

28 and 7 are related by dividing 28 by 7 to get the number in the middle. 144 is related to 12 in the SAME way (dividing 144 by 12 results in 12). The relationship is DIVIDE

8.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(31 [93] 3), (17 [85] 5), (27 [?] 4)

Choose the correct answer from the four choices available.

(31 [93] 3), (17 [85] 5), (27 [?] 4)

108

110

100

112

31 and 3 are related by multiplying 31 by 3 to get the number in the middle. 17 is related to 5 in the SAME way (multiplying 17 by 5 results in 85). 27 x 4 = 108. The relationship is MULTIPLY

9.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(47 [141] 3), (32 [64] 2), (23 [?] 4)

Choose the correct answer from the four choices available.

(47 [141] 3), (32 [64] 2), (23 [?] 4)

29

92

94

90

47 and 3 are related by multiplying 47 by 3 to get the number in the middle. 32 is related to 2 in the SAME way (multiplying 32 by 2 results in 64). 23 x 4 = 92. The relationship is MULTIPLY

10.

Look at the relationship between the first and last number in each set of brackets, and use that relationship to find the missing number.

Choose the correct answer from the four choices available.

(53 [106] 2), (16 [112] 7), (12 [?] 7)

Choose the correct answer from the four choices available.

(53 [106] 2), (16 [112] 7), (12 [?] 7)

82

48

84

46

53 and 2 are related by multiplying 53 by 2 to get the number in the middle. 16 is related to 7 in the SAME way (multiplying 16 by 7 results in 112). 12 x 7 = 84. The relationship is MULTIPLY

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