Number Series, Coding and DecodingMCQMTP June 24 Series IIQuestion 2076 of 217
All Questions

In the following series, which number will replace the question mark: 23,29,31,37,41,43,?\displaystyle 23, 29, 31, 37, 41, 43, ?

Options

A45\displaystyle 45
B53\displaystyle 53
C47\displaystyle 47
D49\displaystyle 49
For any discrepancies in this question, email contact@cadada.in

Correct Answer

✅ Option c — 47\displaystyle 47

All Options:

  • A45\displaystyle 45
  • B53\displaystyle 53
  • C47\displaystyle 47
  • D49\displaystyle 49

Ad

Detailed Solution & Explanation

To find the number that replaces the question mark in the series 23,29,31,37,41,43,?\displaystyle 23, 29, 31, 37, 41, 43, ?, let us analyze the properties of the numbers in the sequence:

We observe that all the numbers in the series are consecutive prime numbers (numbers greater than 1 that have no positive divisors other than 1 and themselves):
- 23\displaystyle 23 is a prime number.
- The next prime number is 29\displaystyle 29.
- The next prime number is 31\displaystyle 31.
- The next prime number is 37\displaystyle 37.
- The next prime number is 41\displaystyle 41.
- The next prime number is 43\displaystyle 43.

Following this logical progression, the prime number immediately following 43\displaystyle 43 is 47\displaystyle 47.

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

About This Chapter: Number Series, Coding and Decoding

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.

View Official ICAI Syllabus

Exam Strategy Tip

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

Related Comparison Tables

Cardinal vs Ordinal Utility: Measuring SatisfactionPromissory Note vs Bill of Exchange: Negotiable Instruments

More Questions from Number Series, Coding and Decoding

The number in place of question mark in: 7,26,63,124,215,?,511\displaystyle 7, 26, 63, 124, 215, ?, 511 is

Find missing term 7,26,63,124,215,342,?\displaystyle 7, 26, 63, 124, 215, 342, ?

Which number should come next 7,26,63,124,215,342,?\displaystyle 7, 26, 63, 124, 215, 342, ?

If CLOCK is coded as 34235 and TIME as 8679, then MOTEL is coded as:

If MOUSE, is coded as 34651 and KEY is coded as 217, then how will YES be coded?

In a certain code language PREMONITION is written as 68530492904\displaystyle 68530492904, how will the word MONITOR be written in that code language?

Ready to Master Number Series, Coding and Decoding?

Practice all 217 questions with instant feedback, earn XP, track your streaks, and ace your CA Foundation exam.

Start Practicing — It's Free