- Sport?

Dear guest, dear Pi-mentalist and memorizer!

Of course you are aware that = 3.1415 means = 3 x 100 + 1 x 10-1 + 4 x 10-2 + 1 x 10-3 + 5 x 10-4, so that when you say " = 3.1415", you mean something more complex, like a double sequence 3 (0), 1 (1), 4 (2), 1 (3), 5 (4).

Now you have learned to N decimals, like the decimal number = 3.1415926535 for N = 10. Here we offer you the opportunity to check your ability to know this in the above sense. Can you say, what is the factor of 10-5 of , i.e. its 5th decimal? Of course you can! The answer is: "9". But how fast are you to produce the answer? And how certain are you with your answer?

Here is a game to check yourself. The game is organized as a sport, and if you wish, you can get a ranking.


For N you can choose N = 10, 100, 5,000, or 10,000. For k you can choose k = 10, 100, 500, or 1,000. You can decide if you are asked single digits (n=1) or double (n=2) or ten (n=10) at a time. The questions are presented in matrix form, and you can choose the setup of the matrix. Anyway, the digits are asked following a random order, i.e. a permutation of the decimals, hence the name Pi-Permutation.

"Good luck!" and "have fun!". Java has to be installed. Browser recommendation  Browser recommendation