Number Series, Coding and DecodingMCQMTP June 2023 Series IQuestion 2067 of 217
All Questions

Find the next alphabet series in the given sequence? ALN, DNP, GPR?

Select Your Answer (Keyboard: A, B, C, D)
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Correct Answer

✅ Option b — JRT

All Options:

  • AKLN
  • BJRT
  • CRNL
  • DRNV

Detailed Solution & Explanation

To find the next term in the alphabet sequence $ALN, DNP, GPR, ?$, we analyze the alphabetical progression of each of the three letter positions separately (where A=1,B=2,…,Z=26\displaystyle A = 1, B = 2, \dots, Z = 26):

1. **First Letter Progression:**
- A→D→G→?\displaystyle A →\displaystyle \to D →\displaystyle \to G →\displaystyle \to ?
- Alphabetical positions: 1→4→7→?\displaystyle 1 →\displaystyle \to 4 →\displaystyle \to 7 →\displaystyle \to ?
- The pattern is a constant increase of +3\displaystyle +3: 7+3=10\displaystyle 7 + 3 = 10, which corresponds to **J**.

2. **Second Letter Progression:**
- L→N→P→?\displaystyle L →\displaystyle \to N →\displaystyle \to P →\displaystyle \to ?
- Alphabetical positions: $12 →\displaystyle \to 14 →\displaystyle \to 16 →\displaystyle \to ?<br>−Thepatternisaconstantincreaseof\displaystyle <br>- The pattern is a constant increase of+2\displaystyle : &#36;16 + 2 = 18, which corresponds to **R**.

3. **Third Letter Progression:**
- N→P→R→?\displaystyle N →\displaystyle \to P →\displaystyle \to R →\displaystyle \to ?
- Alphabetical positions: $14 →\displaystyle \to 16 →\displaystyle \to 18 →\displaystyle \to ?<br>−Thepatternisaconstantincreaseof\displaystyle <br>- The pattern is a constant increase of+2\displaystyle : &#36;18 + 2 = 20, which corresponds to **T**.

Combining the three letter positions, the next term in the sequence is **JRT**.

*Note on Answer Key Discrepancy:* The textbook/exam answer key lists **Option A** (KLN\displaystyle KLN) as the correct answer. However, KLN\displaystyle KLN has no logical alignment with the shifts observed in the sequence, whereas JRT\displaystyle JRT follows a strict, consistent mathematical progression. This represents a typographical error in the official answer key, and the correct option is **Option B**.

Hence, **Option B** 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.

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