Last week’s answer: It is Monday. If tomorrow’s yesterday is Tuesday, then Tuesday is the day before tomorrow which is today, so today is Tuesday. Yesterday’s tomorrow is the day after yesterday, which is today, which is Tuesday. So the day before yesterday’s tomorrow is the day before today, which is the day before Tuesday, which is Monday.
This week’s problem: Six hockey teams play each other once. How many matches will need to be played?
The answer will be in next week’s weekly problem.