If Tomorrow Is Sunday, What Day Was Yesterday?
Medium-difficulty multiple-choice quiz exploring logical reasoning, calendar relationships, and common pitfalls using the prompt 'If tomorrow is Sunday, what day was yesterday?'.
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Quiz Questions & Answers
Review every prompt, the correct responses, and helpful context to prep for your own run-through.
Question 1: If tomorrow is Sunday, what day was yesterday?
Monday
Saturday
Thursday
Friday
Question 2: Which reasoning error best explains why someone might choose Saturday as the answer?
Confirmation bias
Base-rate neglect
Confusing today and tomorrow
Availability heuristic
Question 3: Apply straightforward logic: if tomorrow is Sunday, what is today?
Friday
Sunday
Thursday
Saturday
Question 4: Which alternative interpretation can make 'Thursday' a plausible intended answer?
Assuming a leap year
Counting only weekdays
Using a non-Gregorian calendar
Changing the reference day to two days later
Question 5: What mindset helps avoid mistakes on short calendar riddles?
Ignore the speaker's tense
Use mental shortcuts only
Rely on intuition alone
Check your reference point first
Question 6: Which of these is a concise verification step after answering the riddle?
Check an unrelated fact
Restart the entire week
Plug the answer back into the original statement
Ask someone else immediately
Question 7: A common myth: 'Calendar riddles are always trick questions.' What's a balanced evaluation?
They require advanced math
They can be straightforward or tricky depending on wording
They are always unsolvable
They depend on astrology signs
Question 8: Scenario evaluation: you answered Thursday but someone argues Friday. What quick question resolves the disagreement?
How many letters are in Sunday?
Do you like weekends?
What day does 'today' refer to in your reasoning?
What is the current month?