Find next term of the series $1, 3, 4, 8, 15, 27, ?$
Select Your Answer (Keyboard: A, B, C, D)
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Number Series, Coding and DecodingMCQMTP Sep 24 Series IIQuestion 2080 of 217
All Questions Correct Answer
✅ Option c — $50$
All Options:
- A$37$
- B$44$
- C$50$
- D$55$
Detailed Solution & Explanation
To find the next term of the series $1, 3, 4, 8, 15, 27, ?81 + 3 + 4 = 83 + 4 + 8 = 154 + 8 + 15 = 278 + 15 + 27 = 50\displaystyle <br><br>Therefore, the mathematically correct answer is **$50**, which corresponds to **Option C**.
*Note on Answer Key Discrepancy:* The textbook answer key lists **Option D** ($55$) as the correct answer. However, $55$ does not satisfy the clear, established Tribonacci progression of the sequence, whereas $50$ completes the mathematical logic perfectly. This is a clear typographical error in the official answer key, and the correct option is **Option C**.
Hence, **Option C** is the correct answer.
*Note on Answer Key Discrepancy:* The textbook answer key lists **Option D** ($55$) as the correct answer. However, $55$ does not satisfy the clear, established Tribonacci progression of the sequence, whereas $50$ completes the mathematical logic perfectly. This is a clear typographical error in the official answer key, and the correct option is **Option C**.
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 SyllabusExam Strategy Tip
This topic carries 5 Marks weightage. Focus on understanding core concepts rather than memorizing.
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