A book called The Penguin Dictionary of Curious and Interesting Numbers by David Wells (1986) contains fascinating numbers and their properties. One of which is the only 3-digit numbers that are prime and all rearrangements of their digit are also prime are 113,119, and 337. Find the 2-digit numbers that also have this property.
Math - Damon, Sunday, November 30, 2008 at 3:44pm
11 - 11
13 - 31
17 - 71
19 - 91
37 - 73
I am getting bored, you keep going