Number Series, Coding and DecodingMCQMTP Dec 2023 Series IQuestion 2141 of 217
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TWENTY is written as 863985 and ELEVEN is written as 323039, then TWELVE can be coded.

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

✅ Option a — 863203

All Options:

  • A863203
  • B862303
  • C826303
  • D862303

Detailed Solution & Explanation

We can find the code for each letter using direct substitution from the given examples:
From the word TWENTY→863985\displaystyle TWENTY \rightarrow 863985, we have:
T=8\displaystyle T = 8, W=6\displaystyle W = 6, E=3\displaystyle E = 3, N=9\displaystyle N = 9, Y=5\displaystyle Y = 5

From the word ELEVEN→323039\displaystyle ELEVEN \rightarrow 323039, we have:
E=3\displaystyle E = 3, L=2\displaystyle L = 2, V=0\displaystyle V = 0, N=9\displaystyle N = 9

Now, let's find the code for the word TWELVE\displaystyle TWELVE by substituting the letters:
T→8\displaystyle T \rightarrow 8
W→6\displaystyle W \rightarrow 6
E→3\displaystyle E \rightarrow 3
L→2\displaystyle L \rightarrow 2
V→0\displaystyle V \rightarrow 0
E→3\displaystyle E \rightarrow 3

Combining these digits in order, we get the code $863203$.

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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