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

Three consecutive terms of a progression are 30, 24, 20. The next terms of the progression is

Question # 2

If all members of a sequence are real numbers then it is called

Question # 3

An indicated sum of terms of a sequence is represented by

Question # 4

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

Question # 5

The sixth term of the sequence 1,3,12,60....is

Question # 6

The difference of two consecutive terms of an A.P is called the

Question # 7

The numbers of G1, G2, G3...... Gnare called n geometric means between a and b is a, G1, G2,G3, ... Gn, b are in

Question # 8

The sum of first twenty odd integers in A.P is

Question # 9

If x,y are two positive distinct numbers then

Question # 10

If x,y are two -ve distinct numbers then

Question # 11

The sum of the squares of three distinct real numbers, which are in G.P., is S2. if their sum isαS then

Question # 12

Given two numbers a and b. Let A denote the single A.M. between these and S denote the sum of n A.M.'s between them. Then S/A depends upon

Question # 13

Find the sum of the infinite geometric series 2 + 1 + 0.5 + ....

Question # 14

1 + 2 + 3 + ...... + n = ______

Question # 15

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

Question # 16

an - an-1 will be common difference in an A.P if

Question # 17

If A is such that a,A,B are in A.P then A is called

Question # 18

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

Question # 19

For an A.P common difference d

Question # 20

If p, q, r and in A.P., a is G.M. between p and q and b is G.M. between q and r, then a2, q2, b2are in

Question # 21

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

Question # 22

pth term of an H.P. is qr and qth term is pr then the rth term of the H.P. is

Question # 23

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

Question # 24

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

Question # 25

The next term of the sequence 1, 2, 4, 7, 11, ..... is.

Question # 26

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

Question # 27

The element range of sequence are called

Question # 28

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

Question # 29

The 7th term of the A.P 7,11,15,is

Question # 30

Find the geometric mean between 4 and 16

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ECAT Mathematics Chapter 8 Important MCQ's

Sr.# Question Answer
1 H.M. between 3 and 7 is
2 Every term of a G.P. is positive and also every term is the sum of two preceding terms. Then the common ratio of the G.P. is
3 The sum of indicated terms of a sequence is called
A. Arithmetic series
B. Series
C. Harmonic series
D. None of these
4
Question Image
A. 0
B. 1
C. 2
D. 3
5 The A.M. of two numbers is 34 and G.M. is 16, the numbers are
A. 2 and 64
B. 64 and 3
C. 64 and 4
D. None of these
6 If a, b, c, d, e, f are in A.P.,then e-c is equal to
A. 2(c - a)
B. 2(f - d)
C. 2(d - c)
D. d - c
7 The harmonic mean between a and b is
8 If a1and r are the first term and the common ratio respectively then (n + 1)th term of the G.P. is
A. 0
B. a1rn-1
C. a1rn+1
D. a1rn
9 If a1, r are first term and the common ratio respectively then the sum of an infinite geometric series is
10 If A is such that a,A,B are in A.P then A is called
A. A.M
B. Common ratio
C. Common difference
D. None of these

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