Good ideas and conversation. No ads, no tracking. Login or Take a Tour!
ooli · 3411 days ago · link · · parent · post: Math fans of Hubski, it's Pi day! Share some math stuff for fun.
If you chose any 2 digit number; 71 And subtract it with the same 2 digit in reverse order: 71-17 =54 Then do it again 54-45=9 At one point You ALWAYS end up with 9 or 0 that the Kaprekar Constant it works for 3 and 4 digits always giving 495 and 6174 .. better than golden ratio in my book.