Number Series, Coding and DecodingMCQMTP March 22Question 2059 of 217

What comes at last place in R, U, X, A, D, ?

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Correct Answer

✅ Option c — G

To find the letter that comes next in the sequence

\displaystyle R, U, X, A, D, ?

, let us convert each letter to its alphabetical position (where

\displaystyle A = 1, B = 2, \dots, Z = 26

):

-

\displaystyle R = 18

\displaystyle U = 21

\displaystyle X = 24

\displaystyle A = 1

(or

\displaystyle 27

in modular arithmetic)
-

\displaystyle D = 4

(or

\displaystyle 30

in modular arithmetic)

Now, we calculate the differences between successive letters:
-

\displaystyle U - R = 21 - 18 = +3

\displaystyle X - U = 24 - 21 = +3

\displaystyle A - X = 27 - 24 = +3

\displaystyle D - A = 30 - 27 = +3

We observe a constant shift of

\displaystyle +3

(skipping exactly 2 letters between each term).
Following this pattern, the position of the next letter is:

D + 3 = 4 + 3 = 7

The

\displaystyle 7

-th letter of the alphabet is

\displaystyle G

.

Hence, **Option C** is the correct answer.

Paper

Paper 3: Quantitative Aptitude

Weightage

5 Marks

Key Topics

Number series, Coding & Decoding, Odd man out

This chapter covers Number series, Coding & Decoding, Odd man out and is part of Paper 3: Quantitative Aptitude in the CA Foundation exam.

Exam Strategy Tip

This topic carries 5 Marks weightage. Focus on understanding core concepts rather than memorizing.

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