Don't worry. We actually have it in 2 parts. 4 questions in a sprint over 5 hours, 3 other questions lasting a week. You might find the weeklong ones more fun.
Interesting, though I have to say these seem more like "working for Quora for free". Would be nice to at least get some interesting data sets in exchange.
Granted, I probably won't improve on Quora's code in a week, but still.
I guess I am simply not the target audience, as I had no plans of applying to quora.