Question

What is a prime number between 70 and 80?

Answer 1

`71`, `73`, and `79`

Explanation:

A prime number is a number that can only be divided by 1 or itself. Otherwise, it is a composite numbers.

There are three numbers between `70` and `80` that fit this criteria, `71`, `73`, and `79`

Here is a worksheet you can use to find all the primes between `1` and `100` for yourself. A similar method was used by mathematicians in Ancient Greece.

It is called the `color(blue)"Sieve of Eratosthenes"`