Part 3
A few questions you have not seen before.
2 of them, and about two minutes. Being wrong costs nothing. You can go again straight away.
No day may be more than a fifth of the total. Your best day made 300 ticks. How many ticks must the total reach?
Same rule, a fifth. Best day 300, total so far 900. How many more ticks are still needed?
Every lesson in this part is still open. So is every part after it. This check opens nothing, because nothing here is closed.