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 number of divisors of 1029, 1547 and 122 are in

Question # 2

The nth term of a G.P. is

Question # 3

If a1and r are the first term and the common ratio respectively then (n + 1)th term of the G.P. is

Question # 4

What is the 26th term of the sequence, if its general term is an = (-1)n+1

Question # 5

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 # 6

If x,y are two positive distinct numbers then

Question # 7

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

Question # 8

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

Question # 9

The fifth term of an A.P. Whose first term is 5 and common difference is 3,is

Question # 10

The sides of a right angled triangle are in A.P The ratio of sides is

Question # 11

If a, b, c are in AP., a, b, c are in G.P. then A, m2b, c are in

Question # 12

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

Question # 13

The 6th term of an arithmetic sequence whose first term is 3 and common difference in zero is

Question # 14

For an arithmetic series to be convergent it is necessary that the series has

Question # 15

A Series which does not coverage to a Unique sum is called

Question # 16

The sum of all 2 digit number is

Question # 17

The third term of a G.P. is 4, The product of first five terms is

Question # 18

The general term of the A.P. is

Question # 19

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

Question # 20

-2, 1, 4, 7,.... is ______

Question # 21

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

Question # 22

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

Question # 23

Arithmetic mean between x - 3 and x + 5 is

Question # 24

If a, b, c, d, e, f are in A.P.,then e-c is equal to

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

The series obtained by adding the terms of an arithmetic sequence is called the

Question # 29

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

Question # 30

A number A is called the arithmetic mean between a and b if a, A, b is ______

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ECAT Mathematics Chapter 8 Important MCQ's

Sr.# Question Answer
1 H.M. between 3 and 7 is
2 A sequence of number whose reciprocals form an arithmetic sequence is called
A. Geometric sequence
B. Arithmetic series
C. Harmonic sequence
D. Harmonic series
3 The fifth term of the sequence an= 2n + 3 is ______
A. 13
B. -13
C. 8
D. 3
4 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
5 The difference of two consecutive terms of an A.P is called the
A. Common difference
B. Common ratio
C. Geometric series
D. Geometric mean
6 If an= 2n -3, write the first four terms
A. -3, -1, 1, 3
B. 1, 3, 5, 7
C. -1, 1, 3, 5
D. None of these
7 The number of divisors of 1029, 1547 and 122 are in
A. A.P.
B. G.P.
C. H.P.
D. None of these
8 The formula an = a +(n-1)d for an A.P is called
A. nth term of an A.P
B. Sum of first n terms
C. A,M between a and b
D. None of the above
9 If ax= by= czand a, b, c are in G.P. then x, y, z are in
A. A.P.
B. G.P.
C. H.P.
D. None of these
10 If a,b,c are in arithmetic progression, then 1/a,1/b.1/c are in
A. A.M
B. G.M
C. H.M
D. G.P

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