Which number will come next in the following series? $675, 623, 573, 525?$
Select Your Answer (Keyboard: A, B, C, D)
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Number Series, Coding and DecodingMCQMTP June 2023 Series IQuestion 2070 of 217
All Questions Correct Answer
✅ Option b — $479$
All Options:
- A$491$
- B$479$
- C$423$
- D$456$
Detailed Solution & Explanation
To find the next term in the series $675, 623, 573, 525, ?\displaystyle , we analyze the differences between consecutive terms:<br><br>- 1st term to 2nd term: $675 - 623 = 52
- 2nd term to 3rd term: $623 - 573 = 50\displaystyle <br>- 3rd term to 4th term: $573 - 525 = 48
We observe that the difference between terms is decreasing by exactly at each step ($52, 50, 48, \dots\displaystyle ).<br>Following this logical pattern, the next difference must be $46. We subtract $46$ from the 4th term ($525$):
Hence, **Option B** is the correct answer.
- 2nd term to 3rd term: $623 - 573 = 50\displaystyle <br>- 3rd term to 4th term: $573 - 525 = 48
We observe that the difference between terms is decreasing by exactly at each step ($52, 50, 48, \dots\displaystyle ).<br>Following this logical pattern, the next difference must be $46. We subtract $46$ from the 4th term ($525$):
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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