# Railway Exam 2021– Reasoning (Letter Series) Questions

Railway Exam 2021 – Reasoning (Letter Series) Questions Set-29:
Dear Readers, Here we have given from Reasoning Questions for Railway Exam 2021. Candidates those who are all preparing for these exams can use this material.

### RRB NTPC Memory Based Paper 2021

Directions(Q. No 1 – 2) In each of the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it
1).a_bbc_aab_cca_bbcc
a)  bacb
b)  acba
c)  abba
d)  caba
2).ab_aa_bbb_aaa_bbba
a)  abba
b)  baab
c)  aaab
d)  abab
Directions(Q. No : 3 – 5) In each of the following questions, various term of a letter series are given with two term missing as shows by(?). Choose the missing term out of the given alternative.
3).Z, L, X, J, V, H, T, F, ?, ?
a)  R, D
b)  R, E
c)  S, E
d)  Q, D
4).Z, S, W, O, T, K, Q, G, ?, ?
a)  N, C
b)  N, D
c)  O, C
d)  O, D
5).W, V, T, S, Q, P, N, M, ?, ?
a)  I, J
b)  J, I
c)  J, K
d)  K, J
6).How many B’s are there in the following letter – series, which are followed by G but G is not be followed by S?
BGSQBRNOBGNSQLTBGQTDBGUWXBGF
a)  4
b)  3
c)  2
d)  5
Directions (Q. 7 – 8) : Which one of the alternatives will replace the question mark(?)
7).MR, PO, SL, VI, ?
a)  YF
b)  ZE
c)  YD
d)  ZF
8).LOT, NNR, QMO, ULK, ?
a)  YKE
b)  YJF
c)  JKF
d)  ZKF
9).In the following series which is the 8th letter to the right of 16thletter from your left ?
ABCDEFGHIJKLMNOPQRSTUVWXYZ
a)  K
b)  Y
c)  X
d)  W
10).If first half of the following series is written in the reverse order, which will be the 5th letter to the left of 13th letter from your right ?
ABCDEFGHIJKLMNOPQRSTUVWXYZ
a)  S
b)  E
c)  F
d)  D
1).b ) 2). b) 3). a) 4). a) 5). d) 6). a) 7). a) 8). d) 9). c) 10). b)
Explanation:

1).aa b b cc / a abb c c / aa b b c c  = acba
In the given series the pattern aabbcc is repeated

2).The letters are repeated twice, than thrice, then four times and so on.
a bb / a aa b b b /a a a ab b b b / a = baab

3).Z L X J V H T F ? ?
The given series consists of two series
Z → X → V → T → H
(-2)  (-2)  (-2)  (-2)
Similarly, L → J → H → F → D

4).Z S W OT K Q G ? ?
The given series is the combination of two series
Z → W → T → Q → N
(-3)  (-3)  (-3)  (-3)
Similarly,
S → O → K → G → C
(-4)  (-4)  (-4)  (-4)

5).W → V → T → S → Q → P → N → M → K → J
(-1)   (-2)    (-1)   (-2)  (-1)   (-2)  (-1)  (-2)  (-1)

6).There are four number series OBG, TBG, DBG, XBG

7).M → P → S → V → Y
(+3)  (+3)  (+3)  (+3)
R → O → L → I → F
(-3)  (-3)  (-3)  (-3)

8).L → N → Q → U → Z
(+2)  (+3)  (+4)  (+5)
O → N → M → L → K
(-1)  (-1)  (-1)  (-1)
T → R → O → K → F
(-2)  (-3)  (-4)  (-5)

9).ABCDEFGHIJKLMNOPQRSTUVWXYZ
16thletter from left is P and 8th letter to the right of P is X. 