ECAT Mathematics Chapter 23 With Answers

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ECAT Mathematics Chapter 23

Sr. # Questions Answers Choice
1 A is proper subset of B A is an improper subset of B A is equivalent to B B is subset of A
2 An empty set Universal set A singleton set None of these
3 A = B if A is equivalent to B
4 {1, 2, 3} is _____ an infinite set A finite set A singleton set Universal set
5 The set of rational numbers is subset of The set of natural numbers The set of real numbers The set of integers The set of whole numbers
6 The set of real numbers is a subset of The set of natural numbers The set of rational numbers The set of integers The set of complex numbers
7 The set of integers is a subset of The set of natural numbers The set of whole numbers The set of prime numbers The set of rational numbers
8 The set of whole numbers is subset of The set on integers The set of natural numbers {1, 3, 5, 7, ....} The set of prime numbers
9 The set of natural numbers is a subset of {1, 2, 3, .... 100} The set of whole numbers {2, 4, 6, 8, .....} None of these
10 Let A and B be two sets. If every element of A is also an element of B then
11 Evert element of A is in B Every element of B is in A Every element of A is in B' Every element of A is in A
12 Natural numbers Whole numbers Integers Rational numbers
13 {1, 2, 3, 4,.....} is set of ______ Natural numbers Whole numbers Integers Rational numbers
14 The number of different ways of describing a set is One Two Three Four
15 The set (Z, +) forms a group Forms a group w.r.t addition Forms a group w.r.t multiplication Non commutative group w.r.t multiplication Doesn't form a group
16 Power set of X i.e P(X)..........under the binary operation of union U Forms a group Does not form a group Has no identity element Infinite set although X is infinite
17 The set {Z\ {0} } is group w.r.t Addition Multiplication Division Subtraction
18 The set R is ........w.r.t subtraction Not a group A group No conclusion drawn Non commutative group
19 The set {1,-1,i,-i} Form a group w.r.t addition Form a group w.r.t multiplication Does not form a group w.r.t multiplication Not closed under multiplication
20 The set of complex numbers forms Commutative group w.r.t addition Commutative group w.r.t multiplication Commutative group w.r.t division Non commutative group w.r.t addition
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