Oh do play games in the elevator too?

one of the things i love about my job is i work on a prime (number) floor..(and you might notice, my profile says i am 47.)

once, i met my son at his office.. we got on the elevator with several others.. and i notices.. 23, 29, 31, 37. and smiled and then notice benjamin was smiling too, when we got off, i said "prime numbers?" and he nodded.. we both played the same game..silently in our heads..other in not too tall building you can sometimes get 3 squares, (9, 16, 25) or 3, 9, 18 (number, square, cube)more complicated patterns include a number and all of its factors (remember, you got on the elevator at 1, even if the button isn't pushed..) or other interesting series..2, 3, 5, 8.
i usually don't talk about this stuff, because, well words are almost normal. we all talk and read, and write a bit.. but playing numbers games in your head.. that's way too wierd!