ECAT Pre Engineering MCQ Test With Answer for Chapter 8 Mathematics

MCQ's Test For ECAT Mathematics Chapter 8 Sequences and Series

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ECAT Mathematics Chapter 8 Sequences and Series

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Question # 1

The seventh term of an A.P whose first term is P and common difference is q. is

Question # 2

If a,b,c are in arithmetic progression, then 1/a,1/b.1/c are in

Question # 3

If ax= by= czand a, b, c are in G.P. then x, y, z are in

Question # 4

A function whose domain is a subset of natural numbers is called ______

Question # 5

If #n = (n-5)2 + 5, then find #3 x #4.

Question # 6

The 10th common term between the series 3+7+11+....... and 1 + 6 +11 + ....... is

Question # 7

In an A.P,a +(n-a)d is

Question # 8

If a, b, c are in A.P., then 3a, 3b, 3care in

Question # 9

The sum of an indicated number of terms in a sequence is called

Question # 10

if a1 =3, d=7 and an =59 , then the number of terms in A.P is

Question # 11

The number of divisors of 1029, 1547 and 122 are in

Question # 12

The nth term of an A.P., is 12-4n. Its common difference is

Question # 13

an -an-1,∀n∈N∧n>1 in an A.P is called

Question # 14

If Sn is a definite number as n → ∞,then the geometric series is

Question # 15

If the pth, qth, and rth terms of an A.P. are in G.P:., then the common ratio of the G.P. is

Question # 16

Sequence also called..............

Question # 17

If G is a G.M between a and b then a,G,b are in

Question # 18

if a9 =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

Question # 19

If a1= a2= 2, an= an-1- 1 (n > 2), then a5is

Question # 20

3, 6, 12,.... is

Question # 21

99th term of the series 2 + 7 + 14 + 23 + 34 + ..... is

Question # 22

Find the next two terms of 7, 9, 12, 16,...

Question # 23

The general term of a sequence is denoted by

Question # 24

If an= 2n -3, write the first four terms

Question # 25

How many numbers are there between 103 and 750 which are divisible by 6

Question # 26

H.M. between 3 and 7 is

Question # 27

For three consecutive terms in A.P middle term is called

Question # 28

The nth term of an A.P is (3n+5) Its 75th term is

Question # 29

If x,y are two -ve distinct numbers then

Question # 30

The sum of first 60 natural numbers is

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ECAT Mathematics Chapter 8 Important MCQ's

Sr.# Question Answer
1 A Series which does not coverage to a Unique sum is called
A. Harmonic Series
B. Oscillatroy Series
C. Arithmetic Series
D. None of these
2 The sum of n terms of a series is denoted by
A. d
B. n
C. Sn
D. an
3 A sequence whose reciprocal is an A.P is called
A. Oscillator
B. H.P
C. G.P
D. None of these
4 pth term of an H.P. is qr and qth term is pr then the rth term of the H.P. is
A. pqr
B. 1
C. pq
D. pqr2
5 If 6th term of a series in A.P, is -2 and 8th term is -8, the first term of the serie is
A. 13
B. -13
C. 18
D. -10
6 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
A. 35
B. 36
C. 48
D. 49
7 No term of a harmonic sequence can be
A. 0
B. 1
C. 2
D. 3
8 A sequence is a functions whose domain is a subset of the set of
A. Natural numbers
B. Real numbers
C. Whole numbers
D. Rational numbers
9 A number A is called the arithmetic mean between a and b if a, A, b is ______
A. Arithmetic sequence
B. Geometric sequence
C. Harmonic sequence
D. Arithmetic sequence
10 If a, b, c are in A.P., then 3a, 3b, 3care in
A. A.P.
B. G.P.
C. H.P.
D. None of these

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