Question

Which of the following sets is a universal set for the other four sets?

(a) The set of even natural numbers

(b) The set of odd natural numbers

(c) The set of natural numbers

(d) The set of negative numbers

(e) The set of integers

Answer 1

Answer: The answer is the set of integers.

Answer 2

The set of integers

Explanation:

The set of integers is a set which contains negative integers, natural numbers, even and odd natural numbers.

Notice also, that natural numbers is a univesal set of the even and odd natural numbers. They both are a subsets of the natural numbers.