These are some of the challenges we have issued when running the Scrapheap Challenge workshop. Each has a 90 minute time limit.

I'm swamped by the email I receive. To help me manage it, I want a tool that notifies me of any messages asking me a question that I haven't answered in three days or more.

Write me a tool that solves the daily Sudoku puzzle in the Daily Telegraph newspaper so that I can look really clever in front of other commuters when taking the train in to work.

Write an "integrationometer" that graphically displays how far the code in my local development workspace has diverged from that in the team's source code repository.