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Mathematics ECAT Pre Engineering Chapter 8 Sequences and Series Online Test MCQs With Answers
Question # 1
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12
13
14
15
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Question # 2
The 6th term of an arithmetic sequence whose first term is 3 and common difference in zero is
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18
6
3
0
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Question # 3
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 # 4
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Question # 5
The 26th term of the A.P -2,-4,10,.............is
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136
-136
148
-148
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Question # 6
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Question # 7
The sides of a right angled triangle are in A.P The ratio of sides is
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1:2:3
3:4:5
2:3:4
5:8:3
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Question # 8
Sum of n terms of a geometric series if | r | < 1 is
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Question # 9
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Question # 10
If 5,7 and 9 are A.Ms between a and b, then a and b is equal to
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2 and 12
1 and 10
3 and 11
-7 and 2
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Question # 11
For an A.P common difference d
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Can be zero
May or may not zero
Cannot be zero
None of these
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Question # 12
If x, y, z are the pth, qth, rth terms of an A.P. and also of G.P., then x
y-z
. y
z-x
. z
x-y
eqals
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xyz
0
1
None of these
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Question # 13
The next term of the sequence 1, 2, 4, 7, 11, ..... is.
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15
16
17
18
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Question # 14
The element range of sequence are called
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Series
progression
Members
Terms
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Question # 15
If a, b, c are in A.P., then 3
a
, 3
b
, 3
c
are in
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A.P.
G.P.
H.P.
None of these
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Question # 16
An infinite sequence has no
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nth term
Last term
Sum
None of these
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Question # 17
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1
2
3/2
5/2
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Question # 18
Let the sequence 1, 2, 2, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, ..... where n consecutive terms have the value n, then 1025th term is
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2
9
2
10
2
11
2
8
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Question # 19
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 # 20
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 # 21
if a
9 =19,a9=31 are the 6th and 9th term of an A.P. and d=4 is the common difference, then 18th term of the sequence is
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65
67
71
75
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Question # 22
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 # 23
p, q, r and s are integers. If the A.M. of the roots of x2- px + q2= 0 and G.M. of the roots of x2- rx + s2= 0 are equal, then
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q is an odd integer
r is an even integer
p is an even integer
s is an odd integer
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Question # 24
an -an-1,∀n∈N∧n>1 in an A.P is called
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Common difference
nth term
Common ratio
None of these
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Question # 25
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 # 26
In following question, a number series is given with one term missing. choose the correct alternative that will same pattern and fill in the blank spaces.1 , 4, 9, 16, 25, x
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35
36
48
49
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Question # 27
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an A.P.
a G.P.
a H.P.
None of these
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Question # 28
The 6th term of the sequence 7,9,12,16......is
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27
32
20
19
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Question # 29
Three consecutive terms of a progression are 30, 24, 20. The next terms of the progression is
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Question # 30
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Question # 31
An A.P. consists of n(odd terms) and its middle term is m. then the sum of the A.P. is
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2 mn
1/2 mn
mn
mn
2
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