Find the odd man out of the series $16, 25, 36, 72, 144, 196, 225$
Select Your Answer (Keyboard: A, B, C, D)
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Number Series, Coding and DecodingMCQMTP May 18Question 2176 of 217
All Questions Correct Answer
✅ Option b — $72$
All Options:
- A$36$
- B$72$
- C$196$
- D$225$
Detailed Solution & Explanation
Let's check the perfect square property for each number in the series:
- $16 = 4^2\displaystyle <br>- $25 = 5^2
- $36 = 6^2\displaystyle <br>- $144 = 12^2
- $196 = 14^2\displaystyle <br>- $225 = 15^2
- $72$ is not a perfect square ($8^2 = 649^2 = 81\displaystyle ).<br><br>Since $72 is the only number in the series that is not a perfect square, it is the odd man out.
Hence, **Option B** is the correct answer.
- $16 = 4^2\displaystyle <br>- $25 = 5^2
- $36 = 6^2\displaystyle <br>- $144 = 12^2
- $196 = 14^2\displaystyle <br>- $225 = 15^2
- $72$ is not a perfect square ($8^2 = 649^2 = 81\displaystyle ).<br><br>Since $72 is the only number in the series that is not a perfect square, it is the odd man out.
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 SyllabusExam Strategy Tip
This topic carries 5 Marks weightage. Focus on understanding core concepts rather than memorizing.
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