Not all odd numbers are prime

Number Theory Level 1

Which of the following is not a prime number ?

19 13 11 17 15

A Former Brilliant Member by A Former Brilliant Member

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

Relevant wiki: Prime Numbers

15 15 is not a prime number because it is divisible by 3 3 and 5 5 .

4 Helpful 0 Interesting 0 Brilliant 0 Confused

I completely agree to your solution as well.

Annie Li - 4 years, 1 month ago

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...