# Sequences and Series MCQ Questions for Class 11 Math’s Chapter 9 with Answers

(i) 31/24
(ii) 31/48
(iii) 24/31
(iv) 48/31

(ii) 31/48

(i) 10201
(ii) 102001
(iii) 100201
(iv) 1002001

(iv) 1002001

## Q3. If a, b, c are in GP then log aⁿ, log bⁿ, log cⁿ are in

(i) AP
(ii) GP
(iii) Either in AP or in GP
(iv) Neither in AP nor in GP

(i) AP

(i) b = a + c
(ii) 2b = a + c
(iii) b² = a + c
(iv) 2b² = a + c

(ii) 2b = a + c

(i) 320
(ii) 330
(iii) 340
(iv) 350

(ii) 330

## Q6. The series ( √2 +1),1,( √2 -1) … is in :

(i) A.P.
(ii) G.P.
(iii) H.P.
(iv) none of these

(ii) G.P.

(i) 1
(ii) 2
(iii) 3
(iv) 4

(iii) 3

(i) 8
(ii) 9
(iii) 10
(iv) 11

(iv) 11

(i) 10
(ii) 12
(iii) 11
(iv) 13

(iii) 11

## Q10. An example of geometric series is

(i) 9, 20, 21, 28
(ii) 1, 2, 4, 8
(iii) 1, 2, 3, 4
(iv) 3, 5, 7, 9

(ii) 1, 2, 4, 8

(i) 492 – 1
(ii) 492
(iii) 502 + 1
(iv) 492 + 2

(iv) 492 + 2

## Q12. The sum of n terms of the series (1/1.2) + (1/2.3) + (1/3.4) + …… is

(i) n/(n+1)
(ii) 1/(n+1)
(iii) 1/n
(iv) None of these

(i) n/(n+1)

(i) 240
(ii) 280
(iii) 330
(iv) 350

(iv) 350

(i) 2 – √3
(ii) 2 +√3
(iii) √3 – 2
(iv) 3+ √2

(ii) 2 +√3

## Q15. Let Tr be the rth term of an A.P. whose first term is a and the common difference is d. If for some positive integers m, n, m ≠ n, T m = 1/n and T n = 1/m then (a-d) equals to

(i) 0
(ii) 1
(iii) 1/mn
(iv) 1/m + 1/n

(i) 0

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