We're starting to weed out the geeks from the chaff now. Get your brain cells round this lot...

1. What on earth is the song "11 Dimensions" actually about?

2. What's you favourite Geek Pop ‘09 stage and why?

3. What does Dr. Stu reckon neutron stars are heavier than?

4. Which member of the Geek Pop crew is in charge of biscuits?

5. Which Chemical Brother reacts most vigorously with water?

HINT: Even if you can't find the answer to number 4 on the site, you've got a 1 in 3 chance of getting it right. Statistics.

Answers on a virtual postcard via Twitter (direct message us) or email (crew@geekpop.co.uk). At the end of the week, one lucky winner for each day's quiz will be sent a Let's Tea Party pin badge. And we'll send an Amateur Transplants album to the geek with the highest score after all five rounds. For questions 2 and 5 today, get creative.