# Letter series online test - Reasoning Online Test paper1 (Letter Series) Number of questions : 20  |  Time : 30 minutes Take Test

## Releted Topics on reasoning

• Analogy online test
• Rankings online test
• Puzzles online test

## Letter Series:

Study the following key tips for Letter series category.  Requesting you to follow the below points before taking any corresponding test.

Going forward,

A(1)       B(2)        C(3)        D(4)       E(5)        F(6)

G(7)       H(8)       I(9)         J(10)      K(11)     L(12)

M(13) N(14)     O(15)     P(16)     Q(17)     R(18)     S(19)

T(20)      U(21)     V(22)     W(23)    X(24)     Y(25)      Z(26)

Going back,

A(26)     B(25)     C(24)     D(23)     E(22)

F(21)      G(20)     H(19)     I(18)       J(17)

K(16)     L(15)      M(14)

N(13)     O(12)     P(11)     Q(10)     R(9)

S(8)        T(7)        U(6)       V(5)       W(4)

X(3)        Y(2)        Z(1)

Letter series or sequence consists of questions where you are supposed to understand the logic behind the series or sequence of letters, numbers or alphanumeric. Below are the important assumptions for solving letter series questions.

1. Check whether it is a continuous series

2. Missing terms in the series

3. Immediate next term of the series

4. Squares of number or cubes of numbers

5. Mathematical operations like addition, subtraction, multiplication or division.

6. Geometric series

7. Harmonic series

Previous year questions:

1. What is the next term in the following series?

1, 4, 3, 9, 5, 16, 7, 25, 9, 36, 11, ?

A. 64

B. 49

C. 48

D. 55

Ans: B

Solution: There are two series 1, 3, 5, 7, 9, 11

4, 9, 16, 25, 36, 49

2. 1, 1, 5, 49, 11, 169, 19, ?

A. 256

B. 289

C. 324

D. 361

Ans: D

Solution: There are two series intermingled in the given series of numbers. Those are 1, 5, 11, 19 and 1 square, 7 square, 13 square and 19 square = 361.