Find odd man out of the following series .
Options
A15
B21
C63
D81
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Number Series, Coding and DecodingMCQPYQ Nov. 18Question 2159 of 217
All Questions Correct Answer
✅ Option d — 81
All Options:
- A15
- B21
- C63
- D81
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Detailed Solution & Explanation
Let's analyze the properties of the numbers in the series :
- All the numbers are composite numbers divisible by :
- However, is a perfect square (), whereas all the other numbers () are not perfect squares.
Therefore, is the odd man out.
Hence, **Option D** is the correct answer.
- All the numbers are composite numbers divisible by :
- However, is a perfect square (), whereas all the other numbers () are not perfect squares.
Therefore, is the odd man out.
Hence, **Option D** 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 SyllabusExam Strategy Tip
This topic carries 5 Marks weightage. Focus on understanding core concepts rather than memorizing.
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