# Which of the following sets are closed under multiplication? Select all that apply.

# 1. Integers

2. Natural numbers

3. Irrational numbers

The closure property of multiplication states that if a, b are the two numbers that belong to a set M then a × b = c also belongs to the set M.

## Answer: Integers and Natural numbers are the sets that are closed under multiplication.

Let us understand the concept of closure property.

## Explanation

Let a, b ∈ N then a × b = ab ∈ N.

Hence, Natural numbers are closed under multiplication.

a, b ∈ Z then a × b = ab ∈ Z

Hence, Integers are closed under multiplication.

√3 ∈ Q’ then √3 × √3 = 3 ∉ Q’

Hence, Irrational numbers are not closed under multiplication.