Number Series, Coding and DecodingMCQPYQ Dec 21Question 2095 of 217
All Questions

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

Options

A715
B517
C175
D571
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Correct Answer

✅ Option a — 715

All Options:

  • A715
  • B517
  • C175
  • D571

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Detailed Solution & Explanation

To find the code for the word **YES** based on the given codes **MOUSE** =34651\displaystyle = 34651 and **KEY** =217\displaystyle = 217, let us extract the direct letter-to-digit mappings:

From **MOUSE** =34651\displaystyle = 34651:
- M→3\displaystyle M \to 3
- O→4\displaystyle O \to 4
- U→6\displaystyle U \to 6
- S→5\displaystyle S \to 5
- E→1\displaystyle E \to 1

From **KEY** =217\displaystyle = 217:
- K→2\displaystyle K \to 2
- E→1\displaystyle E \to 1
- Y→7\displaystyle Y \to 7
*(We note that the mapping for E→1\displaystyle E \to 1 is perfectly consistent in both words).*

Now, we apply these mappings to the word **YES**:
- Y→7\displaystyle Y \to 7
- E→1\displaystyle E \to 1
- S→5\displaystyle S \to 5

Putting the digits together in sequence, the code for **YES** is **715**.

Hence, **Option A** 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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