More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
ECAT Pre General Science Mathematics Chapter 8 Sequences and Series Online Test MCQs With Answers
Question # 1
A sequence having no last term is called
Choose an answer
arithmetic sequence
Geometric sequence
Finite sequence
Infinite sequence
Previous
Skip
Next
Question # 2
If A is such that a,A,B are in A.P then A is called
Choose an answer
A.M
Common ratio
Common difference
None of these
Previous
Skip
Next
Question # 3
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
Previous
Skip
Next
Question # 4
A sequence is a functions whose domain is a subset of the set of
Choose an answer
Natural numbers
Real numbers
Whole numbers
Rational numbers
Previous
Skip
Next
Question # 5
If x,y are two positive distinct numbers then
Choose an answer
A>G>H
A<G<H
A=G=H
None of these
Previous
Skip
Next
Question # 6
If a
1
, r and a
n
are the first term, common ratio and the nth term respectively of a G. P. then a
n
=
Choose an answer
a
1
r
n
a
1
r
n-1
a
1
r
n+1
a
1
r
Previous
Skip
Next
Question # 7
The sixth term of the sequence 1,3,12,60....is
Choose an answer
1500
72
2160
2520
Previous
Skip
Next
Question # 8
Let S
n
denote the sum of the first n terms of an A.P. If S
2n
= 3 S
n
: S
n
is equal to
Choose an answer
4
6
8
10
Previous
Skip
Next
Question # 9
Geometric mean between a and b is
Choose an answer
Previous
Skip
Next
Question # 10
Choose an answer
Previous
Skip
Next
Question # 11
A sequence of number whose reciprocals form an arithmetic sequence is called
Choose an answer
Geometric sequence
Arithmetic series
Harmonic sequence
Harmonic series
Previous
Skip
Next
Question # 12
A function whose domain is a subset of natural numbers is called ______
Choose an answer
Identity function
Sequence
Onto function
Series
Previous
Skip
Next
Question # 13
an - an-1 will be common difference in an A.P if
Choose an answer
n = 1∀n∈ N
n>1∧n∈N
n∈Z
None of the above
Previous
Skip
Next
Question # 14
-2, 1, 4, 7,.... is ______
Choose an answer
Harmonic sequence
Arithmetic sequence
Geometric sequence
Arithmetic series
Previous
Skip
Next
Question # 15
If all members of a sequence are real numbers then it is called a
Choose an answer
Series
Function
Real sequence
Range
Previous
Skip
Next
Question # 16
The next term of the sequence 1, 2, 4, 7, 11, ..... is.
Choose an answer
15
16
17
18
Previous
Skip
Next
Question # 17
The sum of infinite numbers of terms of an arithmetic series is
Choose an answer
Finite
Infinite
May or may not finite
None of these
Previous
Skip
Next
Question # 18
If a,b,c are in arithmetic progression, then 1/a,1/b.1/c are in
Choose an answer
A.M
G.M
H.M
G.P
Previous
Skip
Next
Question # 19
The sum of n terms of a series is denoted by
Choose an answer
d
n
S
n
a
n
Previous
Skip
Next
Question # 20
If 6th term of a series in A.P, is -2 and 8th term is -8, the first term of the serie is
Choose an answer
13
-13
18
-10
Previous
Skip
Next
Question # 21
If a
n
= 2n -3, write the first four terms
Choose an answer
-3, -1, 1, 3
1, 3, 5, 7
-1, 1, 3, 5
None of these
Previous
Skip
Next
Question # 22
The series obtained by adding the terms of a geometric sequence is called
Choose an answer
Infinite series
Arithmetic series
Geometric series
Harmonic series
Previous
Skip
Next
Question # 23
If the pth, qth, and rth terms of an A.P. are in G.P:., then the common ratio of the G.P. is
Choose an answer
Previous
Skip
Next
Question # 24
If a
1
= a
2
= 2, a
n
= a
n-1
- 1 (n > 2), then a
5
is
Choose an answer
1
0
-1
-2
Previous
Skip
Next
Question # 25
The fifth term of the sequence a
n
= 2n + 3 is ______
Choose an answer
13
-13
8
3
Previous
Skip
Next
Question # 26
Arithmetic mean between a and b is
Choose an answer
Previous
Skip
Next
Question # 27
Choose an answer
Previous
Skip
Next
Question # 28
Choose an answer
Previous
Skip
Next
Question # 29
G is geometric mean between a and b if a, G, b is
Choose an answer
A.P.
G.P.
H.P.
None of these
Previous
Skip
Next
Question # 30
How many numbers are there between 103 and 750 which are divisible by 6
Choose an answer
125
107
108
113
Previous
Skip
Next
Question # 31
The number of divisors of 1029, 1547 and 122 are in
Choose an answer
A.P.
G.P.
H.P.
None of these
Previous
Skip
Next
Back