Set Theory Quiz

A set is a:

• Collection of random numbers

• Collection of well-defined objects

• Collection of letters only

• Collection of equations

The symbol ∈ means:

• Not equal to

• Belongs to

• Subset of

• Intersection

Which of the following is a finite set?

• Set of all natural numbers

• Set of even numbers

• Set of vowels in the English alphabet

• Set of all points on a line

The null set or empty set is denoted by:

• {0}

• { } or Ø

• (0)

• 1

The universal set contains:

• All possible elements under consideration

• No elements

• Only even numbers

• Only prime numbers

If A= 1,2,3,4 and B= 3,4,5,6 then A intersection B is :

• {1, 2, 5, 6}

• {3, 4}

• {1, 2, 3, 4, 5, 6}

• { }

IfA=a,b,c , then the number of subsets of A is:

• 3

• 6

• 8

• 9

If A= 1,2,3 and B=3,4,5 then A union B =

• {1, 2, 3}

• {3, 4, 5}

• {1, 2, 3, 4, 5}

• {1, 2, 4, 5}

Two sets are said to be equal if:

• They have the same number of elements

• They have exactly the same elements

• They have at least one common element

• Their union is a null set

The complement of a set (written as ) is:

• Elements not in A but in the universal set

• All elements of A

• The intersection of A with itself

• The union of A and the universal set