What is a prime number between 70 and 80?

1 Answer
Jim G. · Stefan V.
May 22, 2016

#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"#

https://ro.pinterest.com/explore/sieve-of-eratosthenes/

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