Rule

A few challenging problems will be assigned roughly bi-weekly. Points are only given to completely correct, or very close to completely correct answers. For each problem, if 1-2 people do it correctly, each person will get an additional 1% of the final score. 3-5 people: 0.7%. 6-10 people: 0.5%. 11-15 people: 0.2%. 16 people or more: 0.05% (This means the problem is not ... that challenging). You may share your answers with you friends (but you're also sharing your points with them).


Problem list

• Problem 1: click here.
Winner: Nathan Page
• Problem 2:
Winner:
• Problem 3:
Winner:
• Problem 4:
Winner:
• Problem 5:
Winner:
• Problem 6:
Winner: