The first term of an A.P. is $100$ and the sum of whose first $6$ terms is $5$ times the sum of the next $6$ terms, then the c.d. is:
Options
A10
B10
C5
Dnone of these
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Sequence and SeriesMTP Nov 19Question 1790 of 128
All Questions Correct Answer
✅ Option a — 10
All Options:
- A10
- B10
- C5
- Dnone of these
About This Chapter: Sequence and Series
Paper
Paper 3: Quantitative Aptitude
Weightage
4-6 Marks
Key Topics
Arithmetic & Geometric Progressions
This chapter covers Arithmetic Progressions (AP) and Geometric Progressions (GP). Students learn how to find the nth term, sum of n terms, arithmetic/geometric means, and sum to infinity of a GP.
View Official ICAI SyllabusExam Strategy Tip
For complex 'sum of series' questions, a great hack is to substitute n = 1 and n = 2 into the question and the options to see which one matches, completely bypassing the formula.
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If the sum of five terms of AP is $75$. Find the third term of the series.
The $20^{th}$ term of arithmetic progression whose $6^{th}$ term is $38$ and $10^{th}$ term is $66$ is:
Divide $69$ into $3$ parts which are in A.P. and are such that the product of first two parts is $483$.
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