ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 8 (Sequences and Series)

MCQ's Test For ECAT (Pre-Eng) Mathematics Chapter 8 Sequences and Series

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ECAT (Pre-Eng) Mathematics Chapter 8 Sequences and Series

00:00
Question # 1

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

Question # 2

If the domain of sequence is finite set then the sequence is called

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Let Sndenote the sum of the first n terms of an A.P. If S2n= 3 Sn: Snis equal to

Question # 7

If A, G, H are the arithmetic, geometric and harmonic means between a and b respectively then A, G, H are in

Question # 8

An infinite sequence has no

Question # 9

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

Question # 10

The nth term of a G.P. is

Question # 11

The three consecutive numbers a,√ab,b are in

Question # 12

1,1/3,1/5,1/7,1/9..... is a

Question # 13

The series obtained by adding the terms of a geometric sequence is called

Question # 14

How many term are there in the A.P, in which a1 = 11 , an =68, d=3

Question # 15

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

Question # 16

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

Question # 17

If x,y are two -ve distinct numbers then

Question # 18

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 # 19

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

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

Question # 21

An A.P., a G.P. and a H.P. have the same first and last terms and the same odd numbers of terms, the middle terms of the three series are in

Question # 22

For an A.P common difference d

Question # 23

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

Question # 24

Sum of first n terms of an arithmetic series is

Question # 25

Write the first four terms of the arithmetic sequence 5, 2, -1, ... is

Question # 26

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

Question # 27

G is geometric mean between a and b if a, G, b is

Question # 28

If a1, r and anare the first term, common ratio and the nth term respectively of a G. P. then an=

Question # 29

The 26th term of the A.P -2,-4,10,.............is

Question # 30

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

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ECAT Mathematics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The common ration of a geometric sequence cannot be
A. 0
B. 1
C. 2
D. 3
2 A number A is said to be the A.M between the two numbers a and b if a, A, b are in
A. A.M
B. A.P
C. G.P
D. G.M
3 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
4
Question Image
A. 1/2
B. 2
C. 1/4
D. 4
5 The third term of a G.P. is the square of first term. If the second term is 8, then the 6th term is
A. 120
B. 124
C. 128
D. 132
6 -2, 1, 4, 7,.... is ______
A. Harmonic sequence
B. Arithmetic sequence
C. Geometric sequence
D. Arithmetic series
7 How many numbers are there between 103 and 750 which are divisible by 6
A. 125
B. 107
C. 108
D. 113
8 If Sn is a definite number as n → ∞,then the geometric series is
A. Convergent
B. Divergent
C. Oscillatroy
D. None of these
9 No term of a harmonic sequence can be
A. 0
B. 1
C. 2
D. 3
10 A Geometric Series is divergent only if
A. |r|>1
B. |r|≥1
C. |r|=1
D. None of these

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