# Series and Number Patterns IQ Test Practice Questions

#### Question No 1

Which number is the odd one out, 41, 43, 47, 53, 61, 71, 73, 81

Solution!
Each of the numbers except 81 is a prime number..

#### Question No 2

4 , 7 , 15 , 29 , 59 , 117 , ?

Solution!
Multiply with 2 and subtract and add 1 alternatively..

#### Question No 3

78214 and 292 , 38421 and 459 , 69517 and ?

Solution!
78 + 214 = 292!38 + 421 = 459! !So, 69 + 517 = 586.

#### Question No 4

9 , 16 , 13 , 13 , 17 , 10 , 21 , 7 , ?

Solution!
There are two interwoven sequences! !Add 4 starting with 9! !and subtract 3 starting with 16..

#### Question No 5

F , O , T , W , ?

Solution!
Skip 8 , 4 , 2 , 1 alphabets..

#### Question No 6

3 , 10 , 33 , 104 , ?

Solution!
Multiply with 3 and add 1, 3, 5, 7,....

#### Question No 7

6 , H , 9 , K , 11 , M , 14 , P , 16 , R , 19 , U , 21 , ?

Solution!
Add 3 and 2 alternatively in number series and skip 2 and 1 alphabets alternatively.

#### Question No 8

759 , 675 , 335 , 165 , ?

Solution!
Each number is formed by multiplying the number formed by the first two digits of the previous number by its third digit.! !So, 16 * 5 = 80.

#### Question No 9

71 , 25 , 83 , 37 , 95 , 49 , ?

Solution!
Two parallel series both with adding 12..

#### Question No 10

2 , 6 , 15 , 34 , 73 , ?

Solution!
Multiply with 2 and add 2 , 3 , 4 , 5 , 6,....

#### Question No 11

156 , 76 , 36 , 16 , ?

Solution!
Subtract 4 from previous term and then divide it with 2 to find next term..

#### Question No 12

O , P , R , U , ?

Solution!
Skip 0 , 1 , 2 , 3,... alphabets..

#### Question No 13

AZ , DX , HU , MQ , ?

Solution!
skip 2 , 3 , 4,... alphabets to find first character and subtract 1 , 2 , 3,... alphabets to find second character..

#### Question No 14

2 , 20 , 42 , 68 , 98 , ?

Solution!
Add 18 , 22 , 26 , 30 , 34,....

#### Question No 15

E , H , K , N , Q , T , ?

Solution!
Skip two alphabets..

#### Question No 16

100 , 96.75 , 93.5 , 90.25 , 87 , ?

Solution!
Deduct 3.25 each time..

#### Question No 17

1.5 , 3 , 5.5 , 9 , 13.5 , ?

Solution!
Add 1.5, 2.5, 3.5, 4.5, 5.5.

#### Question No 18

1 , 4 , 2 , 5 , 3 , 6 , 4 , ?

Solution!
There are two interwoven sequences.! !First starts with 1 and second with 4!Add 1 in both series.

#### Question No 19

14 , 16 , 28 , 32 , 42 , 48 , 56 , 64 , ? , ?

Solution!
There are two interwoven sequences, add 14 starting at 14 and add 16 starting at 16..

#### Question No 20

110 , ? , 99 , 81 , 72 , 63 , 54 , 45

Solution!
Deduct the sum of the digits of the previous number each time..

#### Question No 21

1 , 2 , 4 , 8 , ?

Solution!

#### Question No 22

7964325 is to 6975234 , 5822139 is to 2859312 as 7469851 is to ?

Solution!
Reverse the first three digits then reverse the last four digits..

#### Question No 23

B , D , G , K , P , ?

Solution!
Skip 1 , 2 , 3,... alphabets..

#### Question No 24

Which number is the odd one out, 396, 462, 572, 427, 671, 264

Solution!
In each number except 427, the middle digit is the sum of other two..

#### Question No 25

B , D , F , H , J , L , ?

Solution!
Skip one alphabet..

#### Question No 26

N , N , P , L , S , I , W , ?

Solution!
Two parallel series. One with skipping 1 , 2 , 3,... alphabets in forward order and other with skipping same alphabets in reverse order..

#### Question No 27

A , B , D , I , ?

Solution!
Multiply position of previous alphabet with 3 and subtract 1 , 2 , 3,... respectively..

#### Question No 28

8 , 16 , 32 , 64 , 128 , ?

Solution!
Multiply previous term with 2 to find next term..

#### Question No 29

7 , 10 , 25 , 94 , 463 , ?

Solution!
7*2 - 4 = 10!and!10*3 - 5 = 25!and!25*4 - 6 = 94!and!94*5 - 7 = 463!In the same way!463*6 - 8 = 2770.

#### Question No 30

20 , 30 , 45 , ?

Solution!
Multiply previous term with 1.5 to find next term..

#### Question No 31

63 , 35 , 15 , 3 , ?

Solution!
8^2 - 1 = 63!and!6^2 - 1 = 35!and!4^2 - 1 = 15!and!2^2 - 1 = 3!in the same way!0^2 - 1 = -1.

#### Question No 32

1 , 1 , 3 , 15 , 105 , ?

Solution!
Multiply by 1, 3, 5, 7, 9.

#### Question No 33

F , I , M , P , T , W , ?

Solution!
Skip 2 and 3 alphabets alternatively..

#### Question No 34

87 , 102 , 119 , 138 , 159 , ?

Solution!
Adding 15 , 17 , 19,....

#### Question No 35

7 , 12 , 19 , 28 , ?

Solution!
add 5 , 7 , 9 , 11,....

#### Question No 36

Which two letters come next in the sequence A , D , I , P , Y , CF , DI , FD , ?

Solution!
take the numerical position of each letter in the alphabet to reveal the sequence of consecutive square numbers 1, 4, 9, 16, 25, 36, 49, 64, 81.

#### Question No 37

Which number is the odd one out, 3, 5, 7, 12, 17, 19

Solution!
Each of the numbers is a prime number except 12..

#### Question No 38

12 , 14 , 34 , 36 , 56 , 58 , 78 , ?

Solution!

#### Question No 39

T , Q , M , H , ?

Solution!
Skip 2 , 3 , 4,... alphabets in reverse order..

#### Question No 40

5 , 26 , 131 , 656 , ?

Solution!
Multiply by 5 and add 1 each time..

#### Question No 41

100 , 97 , 91 , 82 , ?

Solution!
-3 , -6 , -9 , -12!(Multiples of 3 are subtracted).

#### Question No 42

Which number is the odd one out, 2, 5, 10, 17, 26, 37, 50, 64

Solution!
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1! !But, 64 is out of pattern..

#### Question No 43

M , F , N , G , R , I , S , L , W , P , ?

Solution!
Two parallel series one with skipping 0 and 3 alphabets alternatively and other with skipping 0 , 1 , 2,....

#### Question No 44

Which number is the odd one out, 16, 25, 36, 72, 144, 196, 225

Solution!
Each of the numbers except 72 is a perfect square..

#### Question No 45

0 , 1 , 4 , 9 , 16 , 25 , 36 , 49 , ?

Solution!
Add 1, 3, 5, 7, etc..

#### Question No 46

Which number is the odd one out, 159, 248, 963, 357, 951, 852 ?

Solution!
In the rest there is the same difference between each digit! eg 8 (-3) 5 (-3) 2.

#### Question No 47

100 , 98 , 94 , 88 , 80 , 70 , ?

Solution!
Deduct 2, 4, 6, 8, 10, 12.

#### Question No 48

-6 , 9 , -27/2 , 81/4 , -243/8 , ?

Solution!
Multiply previous term with -3/2 to find next term..

#### Question No 49

64521 is to 41256 as 38297 is to..

Solution!
A B C D E!6 4 5 2 1! !B E D C A!4 1 2 5 6! !A B C D E!3 8 2 9 7! !B E D C A!8 7 9 2 3.

#### Question No 50

A , E , X , H , U , ?

Solution!
Two parallel series, one with skipping two alphabets in reverse order and other with skipping two alphabets in forward order.

#### Question No 51

O , R , M , T , K , V , I , ?

Solution!
Two parallel series one with skipping one alphabet in reverse order and other with skipping one alphabet in forward order..

#### Question No 52

0 , 3 , 8 , 15 , ?

Solution!
Add 3 , 5 , 7,....

#### Question No 53

2 , 7 , 5 , 5 , 8 , 3 , 11 , ?

Solution!
Two parallel series one with adding 3 and other with subtracting 2..

#### Question No 54

100 , 50 , 200 , 25 , 400 , ?

Solution!
There are two interwoven sequences.! ! Multiply 2 starting at 100 and devide by 2 starting at 50..

#### Question No 55

Which number is the odd one out, 8, 27, 64, 100, 125, 216, 343

Solution!
All others are perfect cube of any number but 100 is not the perfect cube of any number..

#### Question No 56

1/32 , 1/16 , 1/4 , 1/2 , 2 , 4 , ?

Solution!
Multiply with 2 and 4 alternatively.

#### Question No 57

6 , 10 , 18 , 34 , 66 , ?

Solution!
Add 4 , 8 , 16 , 32,....

#### Question No 58

180 , 140 , 179 , 138 , 177 , 134 , ?

Solution!
Two parallel series, one with subtracting 1,2,3,... and other with subtracting 2,4,6,....

#### Question No 59

Which number is the odd one out, 1, 4, 9, 16, 20, 36, 49

Solution!
All other numbers are perfect square of numbers but 20 is not perfect square of any number..

#### Question No 60

2 , 5 , 10 , 17 , 26 , ?

Solution!
add 3 , 5 , 7 , 9 , 11,....

#### Question No 61

Which number is the odd one out, 331, 482, 551, 263, 383, 362, 284

Solution!
In each number except 383, the product of first and third digits is the middle one..

#### Question No 62

BZ , EW , HT , KQ , ?

Solution!
Skip 2 alphabets in forward order to find first alphabet and skip 2 alphabets in reverse order to find 2nd alphabet..

#### Question No 63

What four-digit number should replace the question mark? 4342 (3176) 1726, 7995 (7516) 2162, 8418 (????) 1725

Solution!
Delete the digits outside the brackets that appear twice, and insert the remaining digits in the brackets in the same order that they appear outside the brackets!8418 (4725) 1725.

#### Question No 64

A , Y , W , U , S , Q , ?

Solution!
Skip one alphabet in reverse order..

#### Question No 65

XYZ , WVV , VSR , UPN , ?

Solution!
Subtract 1 from first 3 from second and 4 from third character..

#### Question No 66

2 , 14 , 32 , 56 , 86 , ?

Solution!
Add 12 , 18 , 24 , 30 , 36,....

#### Question No 67

0 , 7 , 15 , 24 , 34 , ?

Solution!
add 7 , 8 , 9 , 10 , 11,....

#### Question No 68

Which number is the odd one out, 10, 25, 45, 54, 60, 75, 80

Solution!
Each of the numbers except 54 is multiple of 5..

#### Question No 69

5 , 5 , 3 , -1 , -7 , ?

Solution!
Subtract 0 ,2 , 4,....

#### Question No 70

0.67 , 0.69 , 0.48 , 0.88 , 0.29 , 1.07 , ?

Solution!
There are two series!Subtract 0.19 from the series starting with 0.67 and add 0.19 from the series starting with 0.69..

#### Question No 71

1 , 1 , 2 , ? , 24 , 120 , 720

Solution!
Multiply by 1, 2, 3 and so on....

#### Question No 72

108 , 189 , 216 , 225 , ?

Solution!
Add 81 , 27 , 9 , 3,....

#### Question No 73

17 , 20 , 19 , 22 , 21 , 24 , 23 , ?

Solution!
Add 3 and subtract 1 alternatively..

#### Question No 74

3925 and 277 , 4697 and 2416 , 6257 and ?

Solution!
3 * 9 = 27! 5 + 2 = 7!(277).! !4 * 6 = 24!and 9 + 7 = 16!(2416)! !Similarly,!6 * 2 = 12!and 5 + 7 = 12!(1212).

#### Question No 75

Find the odd man out, 3, 5, 11, 14, 17, 21

Solution!
Each of the numbers except 14 is an odd number.! !The number '14' is the only EVEN number..

#### Question No 76

3.4 , 6.3 , 9.2 , 12.1 , 15 , ?

Solution!
Add 2.9 in previous term to find next term..

#### Question No 77

36 , 72 , ? , 144 , 180 , 216 , 252

Solution!

#### Question No 78

9 , 18 , 27 , ? , 45 , ? , 63

Solution!

#### Question No 79

3 , 6 , 9 , 12 , 15 , ?

Solution!
Add 3 in previous term to find next term..

#### Question No 80

492 , 366 , 189 , 810 , ?

Solution!
8 * 1 = 8, 8 + 0 = 8.

#### Question No 81

Which number is the odd one out, 6, 9, 15, 21, 24, 28, 30

Solution!
Each of the numbers except 28, is a multiple of 3..

#### Question No 82

C , G , L , R , ?

Solution!
Skip 3 , 4 , 5,... alphabets..

#### Question No 83

0 , 100 , 6 , 94 , 12 , 88 , 18 , 82 , ? , ?

Solution!
There are two sequences interwoven.! !Add 6 starting at 0 and deduct 6 starting at 100..

#### Question No 84

17 , 34 , 51 , 68 , ?

Solution!

#### Question No 85

1 , 1 , 2.5 , 3.5 , 4 , 6 , 5.5 , 8.5 , ? , ?

Solution!
There are two interwoven sequences.! !+1.5 starting at the first 1, and +2.5 starting at the second 1..

#### Question No 86

100 , 1 , 97.5 , 3.5 , 92.5 , 8.5 , 85 , 16 , ? , ?

Solution!
There are two interwoven sequences.! ! subtract 2.5, 5, 7.5 starting at 100 and Add 2.5, 5, 7.5 starting at 1..

#### Question No 87

7/2 , 4 , 7 , 14 , ?

Solution!
Multiply previous 2 numbers and divide by 2..

#### Question No 88

1 , 2.65 , 4.3 , 5.95 , 7.6 , ?

Solution!
1.65 is adding in each term..

#### Question No 89

1 , 2 , 3 , 5 , 7 , 10 , 13 , 17 , 21 , ? , ?

Solution!
+1, +1, +2, +2, +3, +3, +4, +4, +5, +5.

#### Question No 90

2 , 6 , 18 , 54 , 162 , ?

Solution!
Multiply previous term with 2 to find next term..

#### Question No 91

C , F , J , O , ?

Solution!
Skip 2 , 3 , 4,... alphabets..

#### Question No 92

3/81 , 4/256 , 5/625 , ?

Solution!
Add 1 in numerator and in denominator!(3*3)^2 = 81!(4*4)^2 = 256!(5*5)^2 = 625!in the same way!(6*6)^2 = 1296.

#### Question No 93

B , L , R , T , ?

Solution!
Skip alphabets 10 , 6 , 2 , -2 , -6,....

#### Question No 94

F , G , I , L , P , ?

Solution!
Skip alphabets 0,1,2,....

#### Question No 95

B , W , F , P , M , E , ?

Solution!
Two parallel series one with skipping 3 , 6,... alphabets and other with skipping 6 , 12,... alphabets..

#### Question No 96

Which number is the odd one out, 10, 14, 16, 18, 21, 24, 26

Solution!
All numbers are even except 21..

#### Question No 97

1/3 , 3/7 , 6/13 , 10/21 , 15/31 , ?

Solution!
Add 2 , 3 , 4,... in numerator and add 4 , 6 , 8,... in denominator..

#### Question No 98

25 , 50 , 27 , 46 , 31 , 38 , 39 , ?

Solution!
There are two interwoven sequences.!Add 2, 4 and 8 from the sequence starting with 25!and subtract 4, 8 and 16 from the sequence starting with 50.

#### Question No 99

7 , 13 , 24 , 45 , 86 , ?

Solution!
Multiply previous term with 2 and subtract 1 , 2 , 3,... to find next term..

#### Question No 100

2 , 5.75 , ? , 13.25 , 17 , 20.75

Solution!

#### Question No 101

C , F , K , R , ?

Solution!
Skip 2 , 4 , 6 , 8,... alphabets.

#### Question No 102

6 , 8 , 10 , 14 , 18 , 26 , 34 , 50 , 66 , ?

Solution!
Add 2, 4, 4, 8, 8, 16, 16,....

#### Question No 103

B , C , E , G , K , ?

Solution!
Prime numbers 2, 3 , 5 , 7 , 11 , 13,....

#### Question No 104

X , U , Q , N , J , G , ?

Solution!
Skip 2 and 3 alphabets alternatively in reverse..

#### Question No 105

Which number is the odd one out, 1, 4, 9, 16, 23, 25, 36

Solution!
Each of the numbers except 23, is perfect square..

#### Question No 106

9 , 11 , 17 , 35 , ?

Solution!
Add 2 , 6 , 18 , 54,...!here!6 = 2*3!18 = 6*3!and!54 = 18*3.

#### Question No 107

Which is the odd number out, 9421 , 7532 , 9854 , 8612 , 6531 , 8541 ?

Solution!
All the other numbers have their digits in descending order..

#### Question No 108

3 , 7 , 2 , 47 , ?

Solution!
3^2 - 7 = 2!7^2 - 2 = 47!In the same way!2^2 - 47 = -43.

#### Question No 109

Which number is the odd one out, 835, 734, 642, 751, 853, 981, 532

Solution!
In each number except 751, the difference of third and first digit is the middle one..

#### Question No 110

2 , -1 , 2 , -1 , 2 , ?

Solution!

#### Question No 111

5 , 2.5 , 1.25 , 0.625 , ?

Solution!
Divide previous term with 2 to find next term..

#### Question No 112

1 , 4 , 9 , 61 , 52 , ?

Solution!
Square 1 , 2 , 3,... and change the sequence of digits..

#### Question No 113

1000 , 971.4 , 942.8 , 914.2 , 885.6 , ?