### Brain Teasers

# Primes by Primes

Consider two-digit prime numbers. Whenever you add the two digits you get a number which is not prime i.e. It may be divisible by 2,3, etc. However there are only five two-digit prime numbers whose digits when added give a result that is divisible by 5. Three are 19,23 and 73.

Can you find the other two prime numbers whose digits add up to a number divisible by 5?

Can you find the other two prime numbers whose digits add up to a number divisible by 5?

### Answer

They are 37 and 41.Hide Answer Show Answer

## What Next?

View a Similar Brain Teaser...

If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.

### Solve a Puzzle

Comments hidden to avoid spoilers.

## Follow Braingle!