Question

A millennium is a period of 1,000 years.

So, 4,000 years is 4 millennia.
How many millennia are there in 5,000 years?

Answer 1

the answer would be 5 millennia

Answer 2

5 millennia

Explanation:

The simplest way to get the answer is that a millennium is 1,000 years and since you mentioned there are 4 millennia in 4,000 years, you would need to divide 5,000 by 1,000. Your answer should be 5 millennia.