Question # 1

If a_n-3 = 2n - 5 then a_n =

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2n-1

2n+1

2n+3

none

What is the general term of the sequence 2, 4, 6, 8, ........... ?

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2n

n + 1

2n²

none of these

Sum of all positive integral multiples of 3 less than 100 is:

Choose an answer

950

760

1230

875

G.M between -2i and 8i is:

Choose an answer

4 or -4

4i or -4i

2 or -2

none

A sequence of numbers whose reciprocal form an arithmetic sequence, is known as:

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arithmetic sequence

geometricsequence

harmonicsequence

none of these

The sum of 10 A.Ms between 3 and 47 is:

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50

250

100

500

Sum of integral multiples of there between 4 and 22 is:

Choose an answer

81

75

211

none

The product of three G.Ms between 1 and 16 is:

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32

64

128

16

If a_n = (n + 1) a_n-1, a₁ = 1, second term of the sequence is:

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3

1

2

4

Sum of all odd numbers between 100 and 200 is:

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6200

6500

3750

7500

7th term of G.P 3, 6, 12 ..... is:

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512

192

48

96

The next term of the sequence 1, 6, 20, 56, ........ is:

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112

144

212

none

A clock strikes once when its hour hand is at one, twice when it is at two, and so on. How many times does the clock strike in ten hours ?

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55

78

66

46

In an A.P.a₃ = 12 and a₇ = 32 then d = :

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5

3

7

9

Which number cannot be a term of a geometric sequence ?

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0

1

-1

r

If S is the H.M between 2 and b then b = :

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-10

10

7

5

A.M between 1 + x - x² and 1 + x + x² is:

Choose an answer

1 + x²

1 + x

2

none

A geometric series is convergent only if:

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| r | > 1

| r | < 1

| r | = 1

none of these

If a_n-1 = 2n - 3 then a_n+1 =

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2n - 1

2n + 1

2n + 3

none

If there are six G.Ms between 3 and 284 then G₄ =

Choose an answer

24

48

12

6

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