Today we are sharing some question based on series. Try to solve these questions and share your marks. Keep Practicing.

### SET 1

#### QUESTIONS

*In each of the following questions, a number series is given with one term missing. Choose the*

*correct alternative that will continue the same pattern and replace the question mark in given series.*

**1)**120, 99, 80, 63, 48, ?

a) 35

b) 38

c) 39

d) 40

e) None of these

**2)**0.5, 0.55, 0.65, 0.8, ?

a) 0.9

b) 0.82

c) 1

d) 0.95

e) None of these

**3)**5, 6, 9, 15, ?, 40

a) 21

b) 25

c) 27

d) 33

e) None of these

**4)**1, 1, 4, 8, 9, 27, 16, ?

a) 32

b) 64

c) 81

d) 256

e) None of these

**5)**240, ?, 120, 40, 10, 2

a) 180

b) 240

c) 420

d) 480

e) None of these

**6)**4, 6, 9, 13 ½ , ?

a) 17 ½

b) 19

c) 20 ¼

d) 22 ¾

e) None of these

**7)**1, 2, 3, 6, 9, 18, ?, 54

a) 18

b) 27

c) 36

d) 81

e) None of these

**8)**2, 3, 3, 5, 10, 13, ?, 43, 172, 177

a) 23

b) 38

c) 39

d) 40

e) None of these

**9)**2, 2, 5, 13, 28, ?

a) 49

b) 50

c) 51

d) 52

e) None of these

**10)**2, 7, 27, 107, 427, ?

a) 1262

b) 1707

c) 4027

d) 4207

e) None of these

####
**ANSWERS WITH
SOLUTIONS**

**1)**Option – a

*Pattern => -*21, -19, -17, -15, .......

So missing term is 35

**2)**Option – c

*Pattern =>*+0.05, +0.10, +0.15, ......

So missing term is 0.8 + 0.20 = 1

**3)**Option – b

*Pattern =>*+1, +3, +6......i.e. +1, +(1+2), +(1+2+3), ....

So missing term is 15 + ( 1+2+3+4 ) = 25

**4)**Option – b

*Pattern =>*1^2 , 1^3, 2^2, 2^3, 2^2, 3^3, ....

So missing term is 4^3 = 64

**5)**Option – b

*Pattern =>*÷1, ÷2, ÷3, ÷4, .....

So missing term is 240 ÷ 1 = 240

**6)**Option – c

*Pattern =>*× 3/2

So missing term is 13 ½ × 3/2 = 27/2 × 3/2 = 20 ¼

**7)**Option – b

*Pattern =>*×2, × 3/2, × 2, × 3/2, ×2, ...

So missing term is 18 × 3/2 = 27

**8)**Option – c

*Pattern =>*+1, ×1, +2, ×2, +3, ×3, ....

So missing term is 13 × 3 = 39

**9)**Option – d

*Pattern =>*+0, +3, +8, +15, ... i.e. +(1^2-1), +(2^2 -1), +(3^2 -1), ...

So missing term is 28 + (5^2 – 1) = 28 + 24 = 52

**10)**Option – b

*Pattern =>*+5, +20, +80, +320, .... i.e. +(5 × 1^2), + (5 × 2^2), +(5 × 4^2), ....

So missing term is 427 + (5 × 16^2) = 427 + 1280 = 1707

### Set 2

#### QUESTIONS

*In each of the following questions, one term in the number series is wrong. Find out the wrong term.*

**1)**2, 5, 10, 17, 26, 37, 50, 64

a) 17

b) 26

c) 37

d) 64

e) None of these

**2)**10, 26, 74, 218, 654, 1946, 5834

a) 26

b) 74

c) 218

d) 654

e) None of these

**3)**1, 3, 12, 25, 48

a) 3

b) 12

c) 25

d) 48

e) None of these

**4)**1, 5, 9, 15, 25, 37, 49

a) 9

b) 15

c) 25

d) 37

e) None of these

**5)**0, 2, 3, 5, 8, 10, 15, 18, 24, 26, 35

a) 18

b) 24

c) 28

d) 10

e) None of these

####
**ANSWERS WITH
SOLUTIONS**

**1)**Options – d

Pattern => (1^2 +
1) , (2^2 + 1), (3^2 + 1), (4^2 + 1), ....

Wrong Term = 64

Right Term = 8 ^ 2 + 1 = 65

**2)**Options – d

Pattern => ×2 + 1, ×3 + 1, ×2 + 1, ×3 + 1,....

Wrong Term = 654

Right Term = 218 × 3 – 4 = 650

**3)**Options – c

Pattern => (1^2 – 0^2), (2^2 – 1^2), (4^2 – 2^2), ....

Wrong Term =25

Right Term = (6 ^2 – 3 ^2) = 27

**4)**Options – b

Pattern => 1^2, (2^2 + 1), 3^2, (4^2 +1), 5^2, (6^2 + 1),
7^2

Wrong Term = 15

Right Term = (4^2 + 1) = 17

**5)**Options – a

Pattern => Its combination of two series

I. 0, 3, 8, 15, 24, 35; and

II. 2, 5, 10, 18, 26

Pattern of both series = +3, +5, +7, +9,...

Wrong in II series = 18

Right = (10 + 7) = 17