Number Series, Coding and DecodingMCQPYQ Nov 19Question 2013 of 217
All Questions

Complete the series 4,16,______,256,1024\displaystyle 4, 16, \_\_\_\_\_\_, 256, 1024

Options

A32
B48
C64
D46
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Correct Answer

Option c64

All Options:

  • A32
  • B48
  • C64
  • D46

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Detailed Solution & Explanation

We are given the series: 4,16,,256,1024\displaystyle 4, 16, \dots, 256, 1024
Let's express the given terms as powers of the base 4\displaystyle 4:
- 4=41\displaystyle 4 = 4^1
- 16=42\displaystyle 16 = 4^2
- 256=44\displaystyle 256 = 4^4
- 1024=45\displaystyle 1024 = 4^5
The series follows the pattern 4n\displaystyle 4^n for consecutive integers n=1,2,3,4,5\displaystyle n = 1, 2, 3, 4, 5.
Therefore, the missing third term must be 43\displaystyle 4^3:
43=644^3 = 64
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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