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ECAT Pre General Science Mathematics Chapter 8 Sequences and Series Online Test MCQs With Answers
Question # 1
The number of divisors of 1029, 1547 and 122 are in
Choose an answer
A.P.
G.P.
H.P.
None of these
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Question # 2
No term of a geometric sequence can be
Choose an answer
0
1
2
3
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Question # 3
Sequence also called..............
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Series
Function
progressions
Elements
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Question # 4
An indicated sum of terms of a sequence is represented by
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Sn
an
S(n)
{Sn}
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Question # 5
A Geometric Series is divergent only if
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|r|>1
|r|≥1
|r|=1
None of these
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Question # 6
The sum of an indicated number of terms in a sequence is called
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sequence
progression
Series
Mean
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Question # 7
The difference of two consecutive terms of an A.P is called the
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Common difference
Common ratio
Geometric series
Geometric mean
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Question # 8
A,G,H are in
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A.P
G.P
H.P
None of these
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Question # 9
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1
2
3/2
5/2
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Question # 10
If S
r
denotes the sum of the first r terms of a G.P., then S
n
, S
2n
- S
n
, S
3n
- S
2n
are in
Choose an answer
A.P.
G.P.
H.P.
None of these
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Question # 11
The formula an = a +(n-1)d for an A.P is called
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nth term of an A.P
Sum of first n terms
A,M between a and b
None of the above
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Question # 12
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Question # 13
If a
1
= 3, r = 2, then the nth term of the G.P. is
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2.3
n-1
3.2
n
3.2
n+1
3.2
n-1
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Question # 14
The 6th term of an arithmetic sequence whose first term is 3 and common difference in zero is
Choose an answer
18
6
3
0
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Question # 15
If the domain of sequence is finite set then the sequence is called
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geometric sequence
infinite sequence
finite sequence
arithmetic sequence
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Question # 16
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0
1
2
3
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Question # 17
Arithmetic mean between x - 3 and x + 5 is
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x + 1
x + 2
x + 3
x + 4
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Question # 18
For three consecutive terms in A.P middle term is called
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A.M
nth term
Central term
None of these
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Question # 19
How many numbers are there between 103 and 750 which are divisible by 6
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125
107
108
113
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Question # 20
The sum of infinite numbers of terms of an arithmetic series is
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Finite
Infinite
May or may not finite
None of these
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Question # 21
The fifth term of an A.P. Whose first term is 5 and common difference is 3,is
Choose an answer
20
17
25
30
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Question # 22
The5thand 13th terms of an A.P are 5 and-3 respectively The first term of the A.P is
Choose an answer
1
-15
9
2
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Question # 23
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Question # 24
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15/23
7/15
7/8
15/7
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Question # 25
A Series which does not coverage to a Unique sum is called
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Harmonic Series
Oscillatroy Series
Arithmetic Series
None of these
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Question # 26
Write the first four terms of the sequence if a
n
= (-1)
n
n
2
Choose an answer
-1, 4, -9, 16
1, -4, 9, 16
1, 4, 9, 16
None of these
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Question # 27
Find the geometric mean between 4 and 16
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Question # 28
If all members of a sequence are real numbers then it is called
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A.P
Real Sequence
G.P
None of these
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Question # 29
If Sn is a definite number as n → ∞,then the geometric series is
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Convergent
Divergent
Oscillatroy
None of these
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Question # 30
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Question # 31
A number H is said to be the H.M. between a and b if a, H, b are in
Choose an answer
A.P.
G. P.
H. P.
None of these
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