Sets

If A = {1,2,3} and B = {2,3,4}, then A - B is:

1. {1}
2. {2,3}
3. {4}
4. {1,4}

Two sets having exactly the same elements are called:

1. Equal sets
2. Empty sets
3. Disjoint sets
4. Universal sets

The power set of a set contains:

1. Only single elements
2. All subsets of the set
3. Only the empty set
4. Only the original set

If A = {1,2,3} and B = {4,5,6}, then A ∩ B is:

1. {1,2,3,4,5,6}
2. { }
3. {3,4}
4. {1,6}

Which of the following is an example of an infinite set?

1. {1,2,3,4}
2. {a,b,c}
3. Set of natural numbers
4. {5,10,15}

If n(A) = 4 and n(B) = 3 and A and B are disjoint sets, then n(A ∪ B) is:

1. 1
2. 7
3. 12
4. 4

If A = {1,2,3,4,5} and B = {2,4}, then B is:

1. Universal set
2. Subset of A
3. Equal to A
4. Empty set

The symbol used for a universal set is:

1. ∅
2. U
3. ∩
4. ⊂

If A = {1, 2} and B = {1, 2, 3, 4}, then A is:

1. Equal to B
2. A subset of B
3. A universal set
4. A disjoint set

If A = {a, b, c}, then the number of subsets of A is:

1. 3
2. 6
3. 8
4. 9

A set containing a limited number of elements is called:

1. Infinite set
2. Empty set
3. Finite set
4. Universal set

If A = {1, 2, 3} and B = {3, 4, 5}, then A ∪ B is:

1. {1, 2, 3, 4, 5}
2. {3}
3. {1, 2}
4. {4, 5}

If A = {2, 4, 6, 8} and B = {1, 2, 3, 4}, then A ∩ B is:

1. {1, 3}
2. {2, 4}
3. {6, 8}
4. {1, 2, 3, 4, 6, 8}

Which of the following represents the empty set?

1. {0}
2. { }
3. {1}
4. {a, b}

If A = {1, 2, 3, 4, 5}, then the number of elements in set A is:

1. 3
2. 4
3. 5
4. 6