Win 1 bitcoin! Bitonic has sold over 200 000 bitcoins

Bitonic has sold over 200 000 bitcoins! To celebrate, we are giving away one bitcoin to the fastest puzzle-solvers. A new puzzle will be released every businessday, five in total, the first to solve each puzzle will be able to claim part of the prize!

The puzzle can be found here: Puzzle 2016

Update January 13:
Today the final puzzle will be available at 15:00 CET.
Same url, 0.3 BTC reward, good luck!

Each puzzle will need to be solved to unlock the next one. We will update our website as puzzles are solved. In addition, we will update this thread with the correct answers. So check back to make sure you can unlock subsequent puzzles!