ECAT Pre General Science Mathematics Chapter 8 Sequences and Series Online Test With Answers

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ECAT Pre General Science Mathematics Chapter 8 Sequences and Series Online Test

Sr. # Questions Answers Choice
1 Find the next two terms of 7, 9, 12, 16,... 18, 20 19, 22 20, 25 21, 27
2
3 If an= 2n -3, write the first four terms -3, -1, 1, 3 1, 3, 5, 7 -1, 1, 3, 5 None of these
4 A function whose domain is a subset of natural numbers is called ______ Identity function Sequence Onto function Series
5 If #n = (n-5)2 + 5, then find #3 x #4. 54 12 4 9
6 The sides of a right angled triangle are in A.P The ratio of sides is 1:2:3 3:4:5 2:3:4 5:8:3
7 The nth term of an A.P is (3n+5) Its 75th term is 26 7 21 Cannot be determined
8 The5thand 13th terms of an A.P are 5 and-3 respectively The first term of the A.P is 1 -15 9 2
9 Which term of the A.P 5,8,11,24.............is 320 104th 106th 105th 64th
10 The sum of all 2 digit number is 4750 3776 4895 4905
11 The sum of first 60 natural numbers is 1830 3660 1640 1770
12 How many numbers are there between 103 and 750 which are divisible by 6 125 107 108 113
13 For an A.P common difference d Can be zero May or may not zero Cannot be zero None of these
14 For an arithmetic series to be convergent it is necessary that the series has Finite terms d<0 Infinite terms None of these
15 An infinite arithmetic series is always Convergent Oscillatory Divergent None of these
16 If Sn is a definite number as n → ∞,then the geometric series is Convergent Divergent Oscillatroy None of these
17 The sum of infinite numbers of terms of an arithmetic series is Finite Infinite May or may not finite None of these
18 The sum of indicated terms of a sequence is called Arithmetic series Series Harmonic series None of these
19 an - an-1 will be common difference in an A.P if n = 1∀n∈ N n>1∧n∈N n∈Z None of the above
20 For three consecutive terms in A.P middle term is called A.M nth term Central term None of these
21 If A is such that a,A,B are in A.P then A is called A.M Common ratio Common difference None of these
22 In an A.P,a +(n-a)d is 1st term General term Last term None of these
23 an -an-1,∀n∈N∧n>1 in an A.P is called Common difference nth term Common ratio None of these
24 If all members of a sequence are real numbers then it is called A.P Real Sequence G.P None of these
25 If x,y are two -ve distinct numbers then A>G>H A<G<H A=G=H None of these
26 If x,y are two positive distinct numbers then A>G>H A<G<H A=G=H None of these
27 A,G,H are in A.P G.P H.P None of these
28 A sequence whose reciprocal is an A.P is called Oscillator H.P G.P None of these
29 A Series which does not coverage to a Unique sum is called Harmonic Series Oscillatroy Series Arithmetic Series None of these
30 A Geometric Series is divergent only if |r|>1 |r|≥1 |r|=1 None of these
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