6. Prepare yourself for the ultimate test of your brain power! We’re devised over 500 IQ
puzzles to stretch your logical and lateral thinking abilities to the limit.
This book has been meticulously compiled from some of the most devious
puzzles you’ve seen. Some will require keen mathematical skill, others an
ability to recognise abstract patterns, but all our puzzles are supremely logical and can
be solved with the right approach.
If you have a sharp mind, some of the answers to these puzzles will jump straight out
of the page at you. However, others will require a bit more thought. Try not to rush for
an answer straight away – have faith in your abilities and all will become clear – and
don’t feel tempted to have a peek at the answer page too soon. If you feel completely
stumped by one particular puzzle, then move on and come back to it later – coming
up with the solution to a later puzzle just might give you the inspiration you need!
But the idea of this book is not about right and wrong answers, it’s about
exercising your mind and flexing your mental muscles. With the right approach, you
too can discover your IQ potential.
The large variety of puzzles here are designed to test your powers of lateral thinking
and problem solving to the max! You’ll have to be able to recognize
patterns and sequences, spot similarities and differences and even pick your way
through our convoluted mindbenders. The solutions to all the puzzles in this book are
staring you right in the face – you just have to be looking at them in the right way!
So sit back, relax your body and let your brain take the strain – it’s all a matter of logic.
EE9A0706-0CA4-40D1-B606-7292843C01F7
10. 1 T
PUZZLE
What is missing in the last grid? E
S
T
1
?
A B C D E F
2
PUZZLE
What time should the missing watch read?
2:31 3:13 3:55 4:37
A B C D E
5:19 4:55 5:13 5:32 6:01
9
EE9A0706-0CA4-40D1-B606-7292843C01F7
11. T 3
PUZZLE
E Which circle replaces the question mark?
S 4 3 2
T 5 3 5 1 1
6 1 2 8 3 3 1
1
7 2 8 4 3
9 ? 3
1 2 3 4 5 6 7 8
4
PUZZLE
Which number replaces the question mark and completes the puzzle?
12 4
7 9 1 4
2
?
10
EE9A0706-0CA4-40D1-B606-7292843C01F7
6 5
12. 5 6 T
PUZZLE PUZZLE
Which letter replaces the question mark Which number completes the puzzle? E
to complete this circle?
S
5
Y W 7 T
11 1
? T 13
17
K P
?
7 8
PUZZLE PUZZLE
Which letter replaces the question mark and Which number replaces the question mark
completes the puzzle? and completes the puzzle?
B
?
F
J
9 25
N 36
4
R
1 81 64 49
? 11
EE9A0706-0CA4-40D1-B606-7292843C01F7
13. T 9 10
PUZZLE PUZZLE
E Which letter is missing from the lower Which letter completes the puzzle?
middle hexagon?
S
E M H D G
T W T
N M J Q
1
N O A
C L
X ?
I B
I ? D R Y
11 12
PUZZLE PUZZLE
Which number is missing from the Which number replaces the question mark and
bottom triangle? completes the puzzle?
3 7 3 6 2
5
2 8 5 4
8
13 1 1 2 4
22
4 2 1 ?
12 ?
EE9A0706-0CA4-40D1-B606-7292843C01F7
14. 13 14 T
PUZZLE PUZZLE
Which letter completes this puzzle? Which letter replaces the question mark to make E
this puzzle work?
S
B G L G A T
1
K P Q F ?
F A ? P J
15 16
PUZZLE PUZZLE
Which number replaces the question mark Where should the minute hand be put
and completes the puzzle? on the bottom clock?
9 1 5
4 8 3
2 ? 7 13
EE9A0706-0CA4-40D1-B606-7292843C01F7
15. T 17 18
PUZZLE PUZZLE
E What is missing from the last hexagon? Which letter completes the puzzle?
S B
T C
1
26 28 31 35 ? E
G
?
19 20
PUZZLE PUZZLE
Which number replaces the question mark and Which number replaces the question mark and
completes the puzzle? completes the puzzle?
2 11 2 15
16
7 4 3 2
4
9 6
13
5 1
?
7
5 6 8 4 6 10
11
14 6 ?
EE9A0706-0CA4-40D1-B606-7292843C01F7
16. 21 22 T
PUZZLE PUZZLE
What is missing from the last circle? Which letter completes the puzzle? E
S
9 8 4 I F
T
1
2 ? E C
2 6 ? E G
23 24
PUZZLE PUZZLE
Which number replaces the question mark and Which letter replaces the question mark and
completes the puzzle? completes the puzzle?
7 9 4 7
17 11 19 10
Z
15 13 16 13
S G
6 11 1 5 M D I
31 16 21 9
26 21 17 ? F E H ? 15
EE9A0706-0CA4-40D1-B606-7292843C01F7
17. T 25
PUZZLE
E Which letter is missing from the lower right hand circle?
S
A C G I
T
1
E Y K E
I U O A
M Q S ?
26
PUZZLE
Which number replaces the question mark and completes the puzzle?
7 3 8 6 2 10
5 7 6
4 2
?
16
EE9A0706-0CA4-40D1-B606-7292843C01F7
18. 27 28 T
PUZZLE PUZZLE
What is missing from the last square? Which numbers complete the puzzle? E
7 3 4 6 1 9
S
2 8 9
1 1 0 9 0 7 T
5 2 4 2 3 2 1
3 2 4
9 9 5 0 0 1
6 7 8 2 9 7
3 6 ?
1 5 4 8 ? ?
29 30
PUZZLE PUZZLE
Which number is the odd one out in each oval? Which letter replaces the question mark and
completes the puzzle?
16
32 72 88
A
48 58 L G H
C W A
28
B 63 86 35 J ? O
49 77
17
EE9A0706-0CA4-40D1-B606-7292843C01F7
19. T 1 2
PUZZLE PUZZLE
E What is missing from the last segment? Which letter completes the puzzle?
S 6 4 4 1
T F O
4 N L 7
H G
2
K Z
5 U ? 1
O ?
6 10 14 2
3 4
PUZZLE PUZZLE
Which tool will make the last scale Which number replaces the question mark
balance? and completes the puzzle?
3 6
4 9
?
6 4
18
8 ?
EE9A0706-0CA4-40D1-B606-7292843C01F7
20. 5 T
PUZZLE
What is missing from the lower middle circle? E
3 1 5 2 2 1 S
6 5 7 9 1 4
T
4 2 7 8 3 6
2
7 1 1 4 6 5
4 8 1 6 3 2
4 2 3 ? 1 9
6
PUZZLE
Which letter replaces the question mark and completes the puzzle?
A C F J L O S U
T P M K G D B X
V Y C E H L N Q
O M I F D Z W U
R V X A E G J N
K H F B Y W S ? 19
EE9A0706-0CA4-40D1-B606-7292843C01F7
21. T 7 8
PUZZLE PUZZLE
E What is missing from the bottom right hand circle? Which letter completes the puzzle?
S 2 2 8
1 5 13
T
L S
29
2
3 7 8
61 125 ?
R ?
9 10
PUZZLE PUZZLE
Which number replaces the question mark and Which number replaces the question mark and
completes the puzzle? completes the puzzle?
10
8 13
6 9 15 27 ? 16 6
4 19
22 ?
20
EE9A0706-0CA4-40D1-B606-7292843C01F7
22. 11 T
PUZZLE
What is missing from the last circle? E
S
A P Y C V C G Y K ?
T
U S E G B
2
12 13
PUZZLE PUZZLE
Which number replaces the question mark and Which letter completes the puzzle?
completes the puzzle?
3 1 4 B K F
7 2 9 G A
1 5 ? L Q ?
14
PUZZLE
Which number replaces the question mark and completes the puzzle?
2 3 9
4 7 3 5 6 2
9 5 ?
21
EE9A0706-0CA4-40D1-B606-7292843C01F7
3 1 4 2 4 3
23. T 15 16
PUZZLE PUZZLE
E What is missing from the last circle? Which number completes the puzzle?
S 2 7 17 4 11
1 9
T
6 2
10 10
3 11 19 1 5
2
? 7
14 1
5 13 ? 2 4
16 9
17
PUZZLE
Which letter replaces the question mark and completes the puzzle?
G B C
H F H
A D ?
22
B D I E K
EE9A0706-0CA4-40D1-B606-7292843C01F7
24. 18 19 T
PUZZLE PUZZLE
Which four digit number is missing from Which number completes the puzzle? E
the last oval?
S
1 3 6 5
195 2 7 6 1
T
2
383 7 8 5 2
8 8 4 ?
575
20
PUZZLE
Which letter replaces the question mark and
completes the puzzle?
763
B Y
C X
955 E V
G T
K P
?
M ? 23
EE9A0706-0CA4-40D1-B606-7292843C01F7
25. T 21
PUZZLE
E Which of the lower circles replaces the question mark?
S K
Q O M
T E U S Q G
A I Y W U K S
2 M C A Y O
G E C
?
A D F G I L P R
22
PUZZLE
Which number replaces the question mark and completes the puzzle?
1 7 3
4 10 6
3 4 7 6 5 ?
23
PUZZLE
Which letter completes the puzzle?
C H A G H J
E F ?
24 R M S M N L
EE9A0706-0CA4-40D1-B606-7292843C01F7
26. 24 T
PUZZLE
What is missing from the last star? E
1 4 10
4 6 11 9 2 7
S
8 6 ?
T
3 2 2 8 5 5
25 2
PUZZLE
Which letter completes the puzzle?
F P Z
C J M T W D
A K ? E
26
PUZZLE
Which number replaces the question mark and completes the puzzle?
5 6 5
7 3 2 10 5 ?
27
PUZZLE
Which number replaces the question mark and completes the puzzle?
3 7 2 8 3 9
18 12 ? 25
EE9A0706-0CA4-40D1-B606-7292843C01F7
27. T 28
PUZZLE
E Which segment completes the puzzle?
1 2
S C L F U J C L F U J F U KH
N V Q RAN V Q RA VQRA T E P Y
T WX
HB
G
O
S MW X
D B
G
O
SM
DK
WX G S
BO
3
AN
U J C L
AN
P Y I I T E S MW X
C L F F U J 4 DKHB 5
2 N V Q R V Q RA Y I E P GS
WX G S MW X G SM C L F U BODK
HB O DKHB O DK N VQR I T E P
P Y I T E P Y I T E XG J C
29
PUZZLE
Which letter replaces the question mark and completes the puzzle?
A J I R Q Z
F M N U V C
E N M V
J Q R ?
30
PUZZLE
Which letter follows the sequence to complete the puzzle?
26
A H F M K R P ?
EE9A0706-0CA4-40D1-B606-7292843C01F7
28. 1 2 T
PUZZLE PUZZLE
Which number replaces the question mark and Which number replaces the question mark E
completes the sequence? and completes the sequence?
S
10 14 4 1 11 11 3
3 1 4 9
3 3 1 6 5
T
6 1
9 2 9 4 2
7 12 6 4 8 9 3 3
2 1 5 3
4 ? 5 1 ? 1 4
3 4
PUZZLE PUZZLE
Which number replaces the question mark and Which letter replaces the question mark and
completes the sequence? completes the sequence?
1 3
5 3 13 INC 2
3 9 4 7
6 QRG 7
5 8
1 9
4 2
4 DOM 8
16 4
4 6 6 3 7 SUI 7
1 ?
3 2 8 AD? 2 27
EE9A0706-0CA4-40D1-B606-7292843C01F7
29. T 5
PUZZLE
E Which letter replaces the question mark and completes the sequence?
S
R
T F N
G O
3
P ?
Z
6
PUZZLE
Which number replaces the question mark and completes the sequence?
4 2 8 7 1 0 8 8
6 3 6 6 7 1 4 2
5 1 5 3 8 7 2 9
3 2 4 8 3 0 6 2
2 1 8 9 4 1 6 4
28 7 4 9 7 6 3 ? 5
EE9A0706-0CA4-40D1-B606-7292843C01F7
30. 7 T
PUZZLE
Which letter replaces the question mark and completes the puzzle? E
F G C S
B H M K J L
T
P B G L U D
N B ?
3
8 9
PUZZLE PUZZLE
Which number replaces the question mark and Which letter replaces the question mark and
completes the puzzle? completes the puzzle?
3 9 1 6
E G
7 2 2 5 7 3 M R Q X
4 1 4 8
9 8 4 5
2 1 7 8 ? 1
H W J ?
6 3 2 3
10
PUZZLE
Which letter replaces the question mark and completes the puzzle?
B U U O L Q G
F H K P K L J C A
M S D G O I H B K E ? 29
EE9A0706-0CA4-40D1-B606-7292843C01F7
31. T 11 12
PUZZLE PUZZLE
E Which number replaces the question mark and Which letter replaces the question mark and
completes the puzzle? completes the puzzle?
S
1 7 9
T F J
3 6 3
C Z O
5 4 2 A N M U
3
C ? B
2 7 5
S J
2 6 ?
13
PUZZLE
Which number replaces the question mark and completes the puzzle?
4 3
1 12 6 7 9 5
2 11
8
14 24 12
?
7 1
8 21 11 6 3 1
30 13 9
EE9A0706-0CA4-40D1-B606-7292843C01F7
32. 14 15 T
PUZZLE PUZZLE
Which letter replaces the question mark Which number replaces the question mark E
and completes the puzzle? and completes the puzzle?
3 9 4 7
S
A
1 6 1 3
T
G I 4 3
3 ?
C E L
6 4 2 2
3
F D G ? 0 6 4 3
16
PUZZLE
Which playing card replaces the question mark and completes the puzzle?
?
31
EE9A0706-0CA4-40D1-B606-7292843C01F7
33. T 17 18
PUZZLE PUZZLE
E Which letter replaces the question mark Which letter replaces the question mark
and completes the sequence? and completes the puzzle?
S D F I
P U Z E
T K P U J
X R M
E M O
A V R
3
F K ? O
G N V
A D Y T E A ?
19 20
PUZZLE PUZZLE
Where should the missing hour Which letter replaces the question mark and
hand point? completes the puzzle?
FM H CH
RL P GG
SJ F NI
DK ? BE
32
EE9A0706-0CA4-40D1-B606-7292843C01F7
34. 21 T
PUZZLE
avis, Harold and Bette all own E
Shangri-la Way
M
Meadow Rise
Honeysuckle
Bungalow properties in rather exclusive
£100,000
S
£40,000
£75,000
areas of the town, and have
Terrace
recently had them valued. Harold lives
Row
Flat
in Meadow Rise, but his property is
Mavis not worth £75,000. The property in
Honeysuckle Row worked out as the
T
Harold
cheapest, despite it being a lovely
Bette road. Bette lives in a terrace house,
although there are no terraced houses
£40,000 along Shangri-La Way. Mavis’s
property is not a bungalow. Can you 3
£75,000
deduce from these clues which person
£100,000 lives where, in which property, and
how much the property was valued.
Shangri-la Way
Owner Property Road Value
Honeysuckle
Row
Meadow Rise
22 23
PUZZLE PUZZLE
Which letter replaces the question mark and Which number replaces the question mark and
completes the puzzle? completes the puzzle?
U 6 EJI 3
L C
M D
D L F P
K G
K T
? 9 NRG ?
33
EE9A0706-0CA4-40D1-B606-7292843C01F7
35. T 24
PUZZLE
E A Which picture cube does this shape make?
C
S
T
3
B D
25 26
PUZZLE PUZZLE
Which letter replaces the question mark and Joe and John are playing
completes the puzzle? marbles. If Joe loses one
marble to John, they will both
have the same number of
D G D marbles, but if John loses one
marble to Joe, Joe will have
H L twice the number of marbles as
John. How many marbles do
Y the two boys currently have?
R L
S K ?
34
EE9A0706-0CA4-40D1-B606-7292843C01F7
36. 27 T
PUZZLE
Which number replaces the question mark and completes the puzzle? E
4 13 3 21 S
12 7 9 5 9 6 8 5 2 5 12 ?
T
3 12 7 16
28 29 3
PUZZLE PUZZLE
Which number replaces the question Which number replaces the question
mark and completes the puzzle? mark and completes the puzzle?
3 12 6 2 7 5
3 6 4 1
13 ? 15 9
2 9 5 7
16 10 18 12
8 1 2 2
11 4 8 8 3 4
15 11
12 ?
30
PUZZLE
Which domino replaces the question mark to complete the puzzle?
35
EE9A0706-0CA4-40D1-B606-7292843C01F7
37. T 1 2
PUZZLE PUZZLE
E Which number is missing? Which letter completes the puzzle?
S
4 5 F K L Q
3 2
T 2 3
9 11
5 A K Z V
4 3 9
2 12 6 1
7 7 M I H D
4 1 4
5 ?
6 3
H C N ?
3 4
PUZZLE PUZZLE
Which symbol replaces the question mark Which number replaces the question mark
and completes the puzzle? and completes the puzzle?
4 2
9 8
15 15
?
22 ?
36
EE9A0706-0CA4-40D1-B606-7292843C01F7
38. 5 T
PUZZLE
What is missing from the last circle? E
4 2 3 7 4 8 S
9 5 11 7
8 7 T
6 3 5 2 6 5
5 1 2 10 3 11
4
13 11 14 6 17 9
9 3 6 0 7 ?
6
PUZZLE
Which letter replaces the question mark and completes the puzzle?
H L P T X B F J
A F K P U Z E J
M S Y E K Q W C
C J Q X E L S Z
Q Y G O W E M U
D M V E N W F ? 37
EE9A0706-0CA4-40D1-B606-7292843C01F7
39. T 7 8
PUZZLE PUZZLE
E What is missing from the bottom left circle? Which letter completes the puzzle?
S C J M
1 2 8
T
S G
2
Q D E
4
? 5 6
R ?
9 10
PUZZLE PUZZLE
Which number replaces the question mark Which number replaces the question mark
and completes the puzzle? and completes the puzzle?
3 5
4 1
32 45 60 77 ?
4 7
5 3
5 ?
38
EE9A0706-0CA4-40D1-B606-7292843C01F7
40. 11 T
PUZZLE
What is missing from the last circle? E
S
A F D J B I O W F O
T
K P P E ?
12 13
PUZZLE PUZZLE
4
Which number replaces the question mark and Which letter completes the puzzle?
completes the puzzle?
1 2 3 B D G
2 1 4 E D
5 6 ? ? I C
14
PUZZLE
Which number replaces the question mark and completes the puzzle?
7 5 9
2 3 6 2 5 4
17 11 ?
9 6 10 4 7 6 39
EE9A0706-0CA4-40D1-B606-7292843C01F7
41. T 15 16
PUZZLE PUZZLE
E What is missing from the last circle? Which number completes the puzzle?
S H C Z 4 14
2 4
T 6 6
7 8
K F W 1 2
3 12
5 12
2 4
4
N Q ?
? 10
17
PUZZLE
Which of the bottom letters replace the question mark and completes the puzzle?
L Z E
T A M
V N ?
40
H D X W B
EE9A0706-0CA4-40D1-B606-7292843C01F7
42. 18 19 T
PUZZLE PUZZLE
What is missing from the last oval? Which number completes the puzzle? E
S
7122 7 2 3 10
T
9 5 13 7
6521
4
6 1 4 5
7 5 9 ?
8332
20
PUZZLE
Which letter replaces the question mark and
completes the puzzle?
4743
B H
C E
9911 D B
D I
E F
387?
F ? 41
EE9A0706-0CA4-40D1-B606-7292843C01F7
43. T 21
PUZZLE
E What is missing from the central circle?
S 5
2 1 7
T 5 1 3 4 2
1 3 7 ? 1 4 2
7 2 3 1 2
6 2 2
5
4
1 2 3 4 5 6 7 8
22
PUZZLE
Which single digit number replaces the question mark?
5 6 6
3 2 4 10 15 ?
23
PUZZLE
Which letter completes the puzzle?
B F J N R V
P U Z
42 C I O U A ?
EE9A0706-0CA4-40D1-B606-7292843C01F7
44. 24 T
PUZZLE
What is missing from the last star? E
7 8 2
S
5 3 3 6 7 2
7 5 ?
T
11 9 7 1 7 12
25
PUZZLE
Which letter completes the puzzle? 4
C K C
R M D Q Z E
F V V ?
26
PUZZLE
Which number replaces the question mark and completes the puzzle?
1 9 3
22 21 ?
3 7 6 2 5 8
27
PUZZLE
Which letter replaces the question mark and completes the puzzle?
B F M C O A
L D ? 43
EE9A0706-0CA4-40D1-B606-7292843C01F7
