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exercise your brain!

MENSA HIGH IQ TEST 180

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mind-bending puzzles

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first edition

Digital Edition

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solve equations • test your skills • every answer inside


Contents Test 1

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Test 2

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Test 3

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Test 4

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Test 5

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Test 6

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Test 7

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Test 8

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Test 9

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The Answers

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8

104 116


Introduction â&#x20AC;¢

7


18

Which of the labelled clocks below continues the series?

A b c

D

30 â&#x20AC;˘ Answers see page 118

E

F


19

Which of these dice is not like the others?

b

A D

c E F

20

A Which number is the odd one out?

B C D

8 7 7 9

7 1 6 6

6 7 5 5

4 6 3 4

3 4 2 3

2 3 1 2

Answers see page 118 â&#x20AC;˘

31


06 Each of the nine squares in the grid marked 1A to 3C should incorporate all of the items which are shown in the squares of the same letter and number, at left and top. For example, square 2A should incorporate all of the items in squares 2 and A. One square however, is incorrect. Which is it?

07

Complete the square using 9 consecutive numbers, so that all rows, columns and large diagonals add up to the same total.

A B

c

1

1a

1b

1c

2

2a

2b

2c

3

3a

3b

3c

18

15 12

48 â&#x20AC;˘ Answers see page 120


08

Which is the odd one out?

A

b

d

c

e

Answers see page 120 â&#x20AC;˘

49


14

15 1

When complete, this 7 x 7 x 7 cube contains 343 individual blocks. How many blocks are required to complete the cube?

Insert the missing numbers.

16 36

76 â&#x20AC;˘ Answers see page 123

?

81 100 144


16

Dubai is 1 hour ahead of Moscow, which is 1 hour ahead of Cairo. It is 11:15am on Wednesday in Dubai, what time is it in the other two cities?

?

DUBAI

MOSCOW

17

What number should replace the question mark?

14

10

9 3

CAIRO

?

2

7 12 3

?

9 11 6 4

6 16 8

15 3

11 9

Answers see page 123 â&#x20AC;¢

77


07

Each of the nine squares in the grid marked 1A to 3C should incorporate all of the items which are shown in the squares of the same letter and number, at left and top. For example, square 2A should incorporate all of the items in squares 2 and A. One square however, is incorrect. Which is it?

A B c

1 1a

1b

2

1c

2a 2b

3

2c

3a 3b

08

3c Which is the odd one out?

96 â&#x20AC;˘ Answers see page 125

63

44

27

81

36

72


09

Which are the odd ones out?

A

b

d

c f e g

Answers see page 125 â&#x20AC;˘

97


18

Which of these dice is not like the other three?

a b

c d

19

Which line of two numbers below has the same relationship as the two above?

A B C D E

114 â&#x20AC;˘ Answers see page 127

6 3

4 7 2 6 8 3 5 5 7 4 9 3 7 4 8 3

: 3 6 : 5 3 : 5 6 : 4 7 : 8 4 : 3 5


20

Which of the labelled clocks below continues the series?

A

b

c

D

E

F

Answers see page 127 â&#x20AC;˘

115


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