Serendip is an independent site partnering with faculty at multiple colleges and universities around the world. Happy exploring!

Reply to comment

Liz's picture

?

I just got to $40 and I still don't understand how this works...

Reply

The content of this field is kept private and will not be shown publicly.
To prevent automated spam submissions leave this field empty.
3 + 6 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.