Monday, December 22, 2014

350: Primes

This little puzzle, via @mathmovesu, asks for three consecutive prime numbers.

Is the guess and check method the best way to go here?

Which prime numbers are candidates and which ones can we safely ignore?

1 comment:

  1. If they are evenly spaced, this number is close to the cube of the middle prime. 10 cubed is 1000, 20 cubed is 8000. So we need to find three primes between 10 and 20. Yes, guess and check is now the way to go.