The MathsNet Trail

Rules
You start with a score of 50 and will be given five tasks. Each will involve researching sites on the Internet to obtain precise facts about mathematics.
Click on the 'M' to return to the beginning (though this will NOT set your score back to 50).
When you have completed your challenge, you will be presented with a form to fill in and send to MathsNet. Your final score will be calculated automatically and will take account of any errors you made.