Series is an important chapter for competitive exams. In every exam you will find at least 5 questions from this chapter. Today I am sharing 10 questions that are repeated in the exams.

## Ques 1.

8 , 10 , 6 , 4 , 3 , ?

(a) 8

(b) 2

(c) 3.5

(d) 2.5

**Ans 1.**The difference between the numbers is reduced by half at each step.

## Ques 2.

2, 6, 12, 20 , 30 , 42 ?

(a) 50

(b) 52

(c) 54

(d) 56

**Ans 2.**The difference between the numbers in this series is increased by 2 at each step.

## Ques 3.

3, 5, 9, 15, 25, 41 , 67, ?

(a) 108

(b) 52

(c) 110

(d) 111

**Ans 3**. The difference between the number in this series is the sum of two previous differences .

( 2+4) ( 4+6) (6+10)(10+ 16) (16 +26)

## Ques 4.

1, 6, 15, ? 45, 66 , 91

(a) 25

(b) 26

(c) 27

(d) 28

**Ans 4.**The difference between the number in this series is increased by 4 at each step .

## Ques 5.

1 ,2 ,5 , 12 , 27 , 58 , 121, ?

(a) 246

(b) 247

(c) 248

(d) 249

**Ans 5.**The sequence in this series is number into 2 plus the numbers in natural order starting . from 0.

## Ques 6.

4 , 9, 16 , 25 , 36, ?

(a) 47

(b) 48

(c) 49

(d) 64

**Ans 6.**The number s in the series are squares of numbers in natural order starting from 2.

## Ques 7.

3 , 8 , 15 , 24 , ? 48 , 63

(a) 30

(b) 32

(c) 35

(d) 36

**Ans 7.**The numbers in this series are the squares of numbers in natural order minus 1 starting from 2.

## Ques 8.

9 , 16 , 30 , 58, ?

(a) 104

(b) 114

(c) 116

(d) 118

**Ans 8.**The difference between the number is doubled at each step.

## Ques 9.

5, 14 , 41 , 86 , ?

(a) 149

(b) 123

(c) 157

(d) 131

**Ans 9.**The difference between the numbers is the multiple of 9 with odd numbers .

## Ques 10.

2, 11 , 7 , 16 , 12, ? 17 , 26

(a) 21

(b) 8

(c) 11

(d) 76

**Ans 10.**The sequence in the series is +9, -4 which is repeated .

ShortcutsRead Number Series Tricks here

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