Number Series, Coding and DecodingMCQPYQ June 22Question 2025 of 217

$\displaystyle 4, 6, 9, 13.5, \_\_\_\_\_\_, 30.375$

A40.50

B20.25

C40.75

D60.25

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Correct Answer

✅ Option b — 20.25

We are given the series:

\displaystyle 4, 6, 9, 13.5, \dots, 30.375

Let's check the ratio between consecutive terms:
-

\displaystyle \frac{6}{4} = 1.5

\displaystyle \frac{9}{6} = 1.5

\displaystyle \frac{13.5}{9} = 1.5

The series is a Geometric Progression with a common ratio of

\displaystyle r = 1.5

.
The next term is:

13.5 \times 1.5 = 20.25

Let's verify the next term in the sequence:

20.25 \times 1.5 = 30.375

This matches the final term perfectly.
Hence, **Option B** 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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