You are requested to partition the set of 10 digits (0,1,…,9) into a maximal number of subsets, such that in each set it is possible to create a prime number
using all its members.

What is the highest prime thus created?

(In reply to Lucky 7 by Steve Herman)

If we're allowed other operations:

2

3

5

7

sqrt(4)

sqrt(9)

8-1

6-0!

Posted by tomarken on 2014-05-16 12:09:28