Mensa IQ Critical Thinking and Problem Solving Flashcards
7 cards from real MENSA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Mensa IQ Critical Thinking and Problem Solving flashcards as text
A man is found dead in a field next to 53 bicycles. What most likely happened?
Answer: He was caught cheating at cards — 'Bicycle' is a playing card brand, and 53 cards suggest a deck plus an extra joker
'Bicycle' is a well-known brand of playing cards; 53 cards (52 standard + 1 joker) point to a card game in which he was caught cheating.
Paul is six feet tall and works as an assistant at a butcher's shop. What does he weigh?
Answer: Meat
A butcher's assistant 'weighs' meat on a scale — the question exploits the double meaning of 'weigh' in the context of his job.
A man lives on the 30th floor. Every morning he rides the elevator to the ground floor. Returning in the evening, he takes the elevator to the 15th floor and walks the rest — except on rainy days, when he rides all the way to the 30th. Why?
Answer: He is too short to reach the 30th-floor button and uses his umbrella to press it on rainy days
The man is short and cannot reach the button for the 30th floor, but on rainy days he can use his umbrella as an extension to press the higher button.
What is the next number in the sequence: 1, 1, 2, 3, 5, 8, 13, ___?
Answer: 21
This is the Fibonacci sequence, where each term equals the sum of the two preceding terms (8 + 13 = 21).
A doctor gives you 3 pills and tells you to take one every half hour. How long will the pills last?
Answer: 1 hour
You take the first pill at 0 minutes, the second at 30 minutes, and the third at 60 minutes — the pills last exactly 1 hour.
A rope ladder hangs from the side of a boat with its bottom rung touching the water. Rungs are 1 foot apart. The tide rises at 4 inches per hour. After 3 hours, how many rungs are submerged?
Answer: None — the ladder rises with the boat
As the tide rises, the floating boat rises with it, keeping the bottom rung always at the waterline — no rungs ever go underwater.
Two guards stand at a fork: one path leads to safety, one to doom. One guard always lies, the other always tells the truth. You may ask one guard one yes/no question to find the safe path. What do you ask?
Answer: 'What would the other guard say if I asked which path leads to safety?'
Asking either guard what the other would say forces both to indicate the dangerous path — the truth-teller honestly reports the liar's wrong answer, and the liar falsely reports the truth-teller's correct answer — so you take the opposite path.