perplexus.info :: Probability : Random Primes

Random Primes (Posted on 2003-07-10)

If you pick any two integers at random, what is that probability that they will be relatively prime? ("relatively prime" means that the two numbers share no divisors except 1)

Tell how you end up with the answer.

See The Solution Submitted by not_so_einstein

Rating: 4.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

PI is not just for circles.

Comment 9 of 9 |

Pi is used in other things, too. This problem has no circles. However, the answer is 6/(pi^2).

Posted by Math Man on 2016-04-03 17:21:41

Please log in:

Login:
Password:
Remember me:

Sign up! \| Forgot password

Search:

Search body:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info