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Q16·CSAT · Prelims 2022

Reverse alphabetical order coding

ReasoningCoding-DecodingFactual singleEasy

Question

If the order of the letters in the English alphabet is reversed and each letter represents the letter whose position it occupies, then which one of the following represents LUCKNOW?

Options

a

OGXPMLD

b

OGXQMLE

c

OFXPMLE

d

OFXPMLD

Answer

Explanation

Reversing the English alphabet means A (1) maps to Z (26), B (2) maps to Y (25), etc. The mathematical rule for reverse alphabetical mapping is: ⟨MATH⟩New Position = 27 - Original Position⟨/MATH⟩.

Apply this to the letters of `LUCKNOW`:

L (12): 27 - 12 = 15 \rightarrow O
U (21): 27 - 21 = 6 \rightarrow F
C (3): 27 - 3 = 24 \rightarrow X
K (11): 27 - 11 = 16 \rightarrow P
N (14): 27 - 14 = 13 \rightarrow M
O (15): 27 - 15 = 12 \rightarrow L
W (23): 27 - 23 = 4 \rightarrow D

Concatenating these letters yields `OFXPMLD`.

To instantly find the reverse alphabetical counterpart of any letter, subtract its standard alphabetical position (1-26) from 27.

Answer: (d).

Question details

Year

2022

Paper

CSAT

Question

Q16

Section

Logical & Analytical Reasoning

Sub-topic

Coding-Decoding

Type

Factual single

Difficulty

Easy

Source hint

LUCKNOW alphabet reversal

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