Pick two or fewer different digits from the set {1, 3, 6, 7} and arrange them to form a number. How many prime numbers can we create in this manner?
3 7 13 31 17 71 37 73 67 See any more?
Add 61 to the list for a total of 10.
Yep....correct....missed that one ! Thanx !
Thanx !
