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If the n^{th} term of an AP is 6n - 1. Then its (n + 1)^{th} term is __________

(A)

6n + 4

(B)

6n + 5

(C)

6n - 4

(D)

6n - 5

Question-2

If G is geometric mean of numbers a and b then G =

(A)

√ab

(B)

±√ab

(C)

ab

(D)

a/b

Question-3

Which term of the G.P, 2, 8, 32.......... up to n term is 131072?

(A)

8^{th} term

(B)

9^{th} term

(C)

7^{th} term

(D)

6^{th}term

Question-4

How many terms of the G.P 3, 3/2, 3/4......... are needed to give the sum 3069/512?

(A)

10

(B)

11

(C)

9

(D)

8

Question-5

1 + 2 + 3 +........30 =

(A)

465

(B)

930

(C)

900

(D)

500

Question-6

The 10^{th} term of an A.P is 52 and 16^{th} terms is 82. Then the 32^{nd} term is

(A)

162

(B)

165

(C)

173

(D)

None of these

Question-7

Sum of the sequence 9, 99, 999, 9999 up to n terms is

(A)

(10^{n} -1) - n

(B)

9/10 (10^{n} - 1) - n

(C)

10/9 (10^{n} - 1) - n

(D)

None of these

Question-8

How many terms of the G.P 3, 3^{2}, 3^{3},...... are needed to give the sum 120?

(A)

4

(B)

5

(C)

6

(D)

18

Question-9

The sum to the first 25 terms of the series 1 + 2 + 3......... is

(A)

305

(B)

325

(C)

315

(D)

335

Question-10

The income of a person is 3,00,000 in the first year and he receives an increase of Rs. 10,000 to his income per year for the next 19 years. Then the total amount, he received in 20 years is

(A)

80,00,000

(B)

79,00,000

(C)

78,00,000

(D)

69,00,000

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