why is the scoring based on time?

[Stellar6666]

so if i complete a puzzle in 30 seconds and get 4 right answers i get 70 points, and if i get 7 answers right but take 113 seconds i get 40 points? im not mad or anything just confused

[oddcouple]

It's a combination of difficulty of question and time spent to solve them. Not just time, not just answers. The optimum score is 100% correct in the shortest possible time.