Number Series, Coding and DecodingPYQ May 25Question 4043 of 217
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In a certain code "CH4IR" is written as "GL8MV". How is "1N5T4GR4M" is written in that code?

Options

A4HFID8E8N
B4P8W7JU8O
C5R9X8KV8Q
D5KF2E4GR4
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Correct Answer

✅ Option c — 5R9X8KV8Q

All Options:

  • A4HFID8E8N
  • B4P8W7JU8O
  • C5R9X8KV8Q
  • D5KF2E4GR4

Detailed Solution & Explanation

Let\'s analyze the coding pattern from the example \"CH4IR\" coded as \"GL8MV\".
Comparing each character in \"CH4IR\" to the corresponding character in \"GL8MV\":
- C (3rd letter) →\displaystyle \to G (7th letter): +4\displaystyle +4 shift
- H (8th letter) →\displaystyle \to L (12th letter): +4\displaystyle +4 shift
- 4 (digit) →\displaystyle \to 8 (digit): +4\displaystyle +4 shift
- I (9th letter) →\displaystyle \to M (13th letter): +4\displaystyle +4 shift
- R (18th letter) →\displaystyle \to V (22nd letter): +4\displaystyle +4 shift
Thus, the pattern is to shift every character (both letters and digits) forward by 4 positions.

Now, let\'s apply this rule to \"1N5T4GR4M\":
- 1 (digit) →1+4=5\displaystyle \to 1 + 4 = 5
- N (14th letter) →14+4=18=R\displaystyle \to 14 + 4 = 18 = \text{R}
- 5 (digit) →5+4=9\displaystyle \to 5 + 4 = 9
- T (20th letter) →20+4=24=X\displaystyle \to 20 + 4 = 24 = \text{X}
- 4 (digit) →4+4=8\displaystyle \to 4 + 4 = 8
- G (7th letter) →7+4=11=K\displaystyle \to 7 + 4 = 11 = \text{K}
- R (18th letter) →18+4=22=V\displaystyle \to 18 + 4 = 22 = \text{V}
- 4 (digit) →4+4=8\displaystyle \to 4 + 4 = 8
- M (13th letter) →13+4=17=Q\displaystyle \to 13 + 4 = 17 = \text{Q}

Combining these, we get \"5R9X8KV8Q\".
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.

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