Please refer to Assignments Class 11 Mathematics Sequences and Series Chapter 9 with solved questions and answers. We have provided Class 11 Mathematics Assignments for all chapters on our website. These problems and solutions for Chapter 9 Sequences and Series Class 11 Mathematics have been prepared as per the latest syllabus and books issued for the current academic year. Learn these solved important questions to get more marks in your class tests and examinations.

## Sequences and Series Assignments Class 11 Mathematics

**Question:**

## Answer

C

**Question: If 9 times the 9th term of an AP is equal to 13 times the 13th term, then the 22nd term of the AP is**

(a) 0

(b) 22

(c) 220

(d) 198

## Answer

A

**Question: If a, b, c, d, e, f are in AP, then the value of e – c will be**

(a) 2(c – a)

(b) 2(f – d)

(c) 2(d – c)

(d) d – c

## Answer

C

**Question:In an AP, the first term is 2 and the sum of the first five terms is one-fourth of the next five terms. The 20th term is**

(a) 112

(b) –112

(c) 114

(d) –114

## Answer

B

**Question: Let S _{n} denote the sum of the first n terms of an AP. If S_{2}n=3S_{n}, thenS_{3n} :S_{n} is equal to**

(a) 4

(b) 6

(c) 8

(d) 10

## Answer

B

**Question:If the sum of n terms of an AP is given by S n n n = 3 + 2 2, then the common difference of the AP is**

(a) 3

(b) 2

(c) 6

(d) 4

## Answer

D

**Question: The interior angles of a polygon are in AP. If the smallest angle be 120° and the common difference be 5, then the number of side is**

(a) 8

(b) 10

(c) 9

(d) 6

## Answer

C

**Question: If the angles of a quadrilateral are in AP, whose common difference is 10°, then the angles of the quadrilateral are**

(a) 65°, 85°, 95°, 105°

(b) 75°, 85°, 95°, 105°

(c) 65°, 75°, 85°, 95°

(d) 65°, 95°, 105°, 115°

## Answer

B

**Question: **

## Answer

B

**Question: If the sum of a certain n number of terms of the AP, 25, 22, 19, … is 116, then the last term is**

(a) 4

(b) 3

(c) 2

(d) –4

## Answer

A

**Question: If log 2, log(2 ^{n} -1) n – and log (2^{n} +3) are in AP, then n is equal to**

(a)5/2

(b) log

_{2}5

(c) log

_{3}5

(d)3/2

## Answer

B

**Question: **

(a) GP

(b) AP

(c) HP

(d) None of these

## Answer

B

**Question: Sum of the first p, q and r terms of an AP are a, b and c respectively. Then,////**

(a) pq

(b) 0

(c) rp

(d) 3

## Answer

B

**Question: If the arithmetic mean of a and b is a ^{n}+b^{n}/a^{n-1}+b^{n-1′ } then the value of n is**

(a) -1

(b) 0

(c) 1

(d) None of these

## Answer

C

**Question: A man saved Rs. 66000 in 20 yr. In each succeeding year after the first year he saved Rs.200 more than what he saved in the previous year. How much did he save in the first year?**

(a) Rs. 1450

(b) Rs. 1400

(c) Rs.1470

(d) Rs. 1480

## Answer

B

**Question:If the ratio of the sum of n terms of two AP’s be (7n + 1) :(4n + 27), then the ratio of their 11th terms will be**

(a) 2 : 3

(b) 3 : 4

(c) 4 : 3

(d) 5 : 6

## Answer

C

**Question: Given that n AM’s are inserted between two sets of numbers a,2 b and 2 a, b where a, b∈R. Suppose further that mth mean between these sets of numbers is same, then the ratio a:b is equal to**

(a) (n – m + 1) : m

(b) (n – m + 1) : n

(c) n: (n – m + 1)

(d) m: (n – m + 1)

## Answer

D

**Question: A carpenter was hired to build 192 window frames.****The first day he made five frames and each day, thereafter he made two more frames than he made the day before. How many days did it take him to finish the job?**

(a) 11

(b) 10

(c) 12

(d) 14

## Answer

C

**Question: Inacrickettournament16schoolterms participated. A sum of Rs. 8000 is to be awarded among themselves as prize money. If the last placed team is awarded Rs.275 in prize money and the award increases by the same amount for successive finishing places, amount will the first place team received is**

(a) Rs. 720

(b) Rs. 725

(c) Rs. 735

(d) Rs.780

## Answer

B

**Question: The sum of nterms of three AP’s whose first term is 1 and common differences are 1, 2, 3 respectively are S _{1}, S_{2}, S_{3} respectively. The true relation is**

(a) S

_{1}S

_{3}S

_{2}

(b) S

_{1}+ S

_{3}= 2 S

_{2}

(c) S

_{1}+ S

_{2}= 2 S

_{3}

(d) S

_{1}S

_{2}S

_{3}

## Answer

B

**Question: If the first term of an AP is a and the sum of the first p terms is zero, then the sum of its next q terms is**

## Answer

B