# Series

## Series

Series: The Well Arranged order of Number/letter placed in a special group is called series.

## The Questions from these chapter can classified into three groups:

### 1. Number Series:

##### TYPE1: Completing the Series:
A Number Series will be given with one term missing, We have to choose the correct alternative that will continue the same pattern and fill in the blank Space.

#### Example:

Example 1: 1, 4, 9, 16, 25, ?

a) 35

b) 36

c) 48

d) 49

Solution: (b) 36, As Given series is of Perfect Squares

Example 2: 2, 3, 5, 7, 11, (...), 17

a) 12

b) 13

c) 14

d) 15

Solution: (b) Consecutive Prime Numbers are given in the Series. After 11 next Prime Number is 13.

##### TYPE2: Picking the Wrong Element:
A Number Series will be given, one number in the number series will be wrong. We have to figure out the wrong term.

#### Example:

Example1: 1, 4, 9, 16, 25, 37, 49

a) 16

b) 9

c) 25

d) 37

Solution: (d) The series is of Perfect Squares but 37 is not a Perfect Square

Example2: 1, 8, 27, 64, 125, 224, 343
a) 224
b) 343
c) 64
d) 27
Solution: (a) The Series of Cubes of 13, 23, 33, 43, 53, 63, 7But 224 is not cube of 6.

### 2. Alphabet Series:

Various term of a letter series will be given with one term missing. We have to choose the missing term out of the given alternatives.

#### Example:

Example1: BEH, KNQ, TWZ,?
a) IJK
b) CFI
c) BDF
Solution: (b) The Series can written in 3 Part
1   B(2) + 9        K(11)    +9     T(20) +9   C(3)
2   E(5) + 9        N(14)    +9    W(23) +9   F(6)
3   H(8) + 9       Q(17)    +9     Z(26) +9   I(9)

Example2: U, O, I, ? ,W
a) E
b) C
c) S
d) G
Solution: (b) U(21)-6=> O(15)-6=> I(9)-6=> C(3)-6=> W(23)

### 3. Letter Series:

In letter series, some of the letters are missing which are given in that order as one of the alternative. We have to choose the alternative which complete the series.

#### Example:

Example1:  a_bbc_aab_cca_bbcc
a) bacb
b) acba
c) abba
d) caba
Solution: (b) The Pattern is aabbcc

Example2: a_bc_c_abb_bca_
a) cccbc
b) cbbac
c) accba
d) abbba
Solution: (c) Pattern is aabcc ccabb bbcaa