A trick question is not hard. That is exactly what makes it so effective. Every question in this article can be answered by a ten-year-old — once they stop and actually read it. The difficulty is never in the vocabulary or the arithmetic. It is in the half-second where your brain recognises a familiar shape, decides it already knows the answer, and stops reading.
Psychologists call that shortcut-taking system your fast, intuitive mode of thinking. It is enormously useful: it is why you can drive, catch a ball, and read this sentence without consciously decoding each letter. It is also why roughly four out of five people confidently answer “ten cents” to a question whose answer is five cents. Trick questions are a controlled way of catching that system in the act.
Below you will find 60 trick questions with answers, sorted into five sets — classic misdirection, maths that defeats mental shortcuts, word and language traps, attention-to-detail questions, and a final set of genuinely hard ones. Every answer is explained, not just stated, so you can see exactly where the trap was laid. There is a scoring guide at the end, plus seven techniques that will make you much harder to fool next time.
What Exactly Is a Trick Question?
A trick question is a question whose difficulty comes from how it is worded rather than from what it asks. The information needed to answer it correctly is always right there in the question. Nothing is hidden, nothing requires outside knowledge, and nothing needs specialist maths. What the question does instead is exploit a predictable habit of the reader.
That makes trick questions different from the other puzzle formats you may have come across. A riddle hides its subject behind metaphor and asks you to identify it — our collection of 100 riddles for adults with answers is built almost entirely on that mechanic. A logic puzzle gives you a set of constraints and asks you to deduce the only arrangement that satisfies them. A pattern recognition question asks you to spot the rule governing a sequence. A trick question does none of these. It simply states something plainly and bets that you will not read it carefully.
There are four families of them, and knowing which family you are in is half the battle:
Assumption traps. The question is answerable only if you supply an assumption that was never given. “Where do you bury the survivors?” works because you assume a crash means fatalities.
Semantic traps. A phrase has two readings and you take the common one. “All but 9 ran away” and “half of two plus two” both live here.
Computation traps. The maths is easy but the intuitive answer is wrong. The bat-and-ball problem is the most studied example in the whole of behavioural science.
Attention traps. The answer is printed in the question and you read straight past it. “Mary’s father has five daughters” is the classic.
Why Trick Questions Are Worth Your Time
It is tempting to file these under “fun but pointless”. They are more useful than that. A trick question trains one very specific habit — the habit of noticing when you are about to answer on autopilot — and that habit transfers to contract clauses, exam papers, bug reports and job interviews alike.
Interviewers know this, which is why variations of these questions still turn up in hiring processes. If you are preparing for one, our set of IQ questions to ace your next interview covers the formats that come up most often. What an interviewer is watching for is rarely the answer itself — it is whether you pause, restate the question, and check your assumptions out loud before committing.
Trick questions are almost pure comprehension and impulse control. That is why someone who is excellent at mental arithmetic can still get the bat-and-ball question wrong.
There is a second, gentler benefit. Trick questions are one of the few puzzle formats that work across a whole room of mixed ages and backgrounds, because nobody has an unfair advantage. That makes them excellent for classrooms, long car journeys and team ice-breakers. If you are collecting material for younger players specifically, the brain teasers for kids collection is pitched at that audience.
15 Classic Trick Questions Everyone Gets Wrong
Start here. These are the canonical ones — the questions that have been circulating for decades because they work on almost everybody, almost every time. Read each one twice before you answer. Genuinely: twice.
1. A farmer has 17 sheep. All but 9 run away. How many sheep does he have left?
Answer: Nine. “All but 9” means 9 stayed behind — the number that ran away is never actually stated.
2. A plane crashes exactly on the border between the United States and Canada. Where do you bury the survivors?
Answer: Nowhere. Survivors are alive, so you do not bury them.
3. How many months of the year have 28 days?
Answer: All twelve. Every month contains a 28th day; February is simply the only one where it is sometimes the last.
4. A doctor gives you three pills and tells you to take one every half hour. How long do the pills last?
Answer: One hour. You take the first immediately, the second after 30 minutes and the third after 60 minutes.
5. Before Mount Everest was discovered, what was the tallest mountain on Earth?
Answer: Mount Everest. It was already the tallest — nobody had measured it yet.
6. You have a bowl with six apples and you take away four. How many apples do you have?
Answer: Four. You have the ones you took; the bowl has two.
7. A man rode into town on Friday and left two days later on Friday. How is that possible?
Answer: His horse was called Friday.
8. How many birthdays does the average person have?
Answer: One. Every year after that is an anniversary of it.
9. Some months have 30 days and some have 31. How many months have 29 days?
Answer: In a leap year, all of them — every month contains a 29th. February is just the only month where the 29th can be the last day.
10. What goes up but never, ever comes back down?
Answer: Your age.
11. If it takes three people three hours to dig three holes, how long does it take one person to dig half a hole?
Answer: There is no such thing as half a hole. A hole of any size is still a whole hole.
12. A rooster lays an egg right on the peak of a barn roof. Which side does the egg roll down?
Answer: Neither. Roosters are male and do not lay eggs.
13. You are running a race and you overtake the person in second place. What position are you in now?
Answer: Second. You took their place, not the leader’s.
14. What can you hold in your left hand but never in your right hand?
Answer: Your right elbow.
15. Which weighs more: a pound of feathers or a pound of bricks?
Answer: Neither — a pound is a pound. The bricks simply take up less space.
15 Math Trick Questions That Beat Your Mental Shortcuts
None of these need anything beyond primary-school arithmetic. What they need is for you to do the arithmetic rather than estimate it. The bat-and-ball question at number 16 is the most famous item in this entire article — in published studies, a majority of students at highly selective universities answer it wrongly on the first attempt.
If the mental arithmetic is the part that slows you down rather than the trap itself, our guide to simple math tricks for everyone covers the shortcuts worth internalising.
16. A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?
Answer: Five cents. If the ball were 10 cents the bat would be $1.10 and the total $1.20. At $0.05 the bat is $1.05 and the total is exactly $1.10.
17. If five machines take five minutes to make five widgets, how long do 100 machines take to make 100 widgets?
Answer: Five minutes. Each machine makes one widget in five minutes, so adding machines adds output, not time.
18. A patch of lily pads doubles in size every day. On day 48 it covers the whole lake. On which day did it cover half the lake?
Answer: Day 47. Doubling once more fills the lake, so the half-way point is the day before the end, not half way through.
19. You borrow $50 from your mother and $50 from your father, buy a $97 shirt and keep $1 of the $3 change after giving them $1 each. You now owe $49 + $49 = $98, plus your $1 makes $99. Where did the missing dollar go?
Answer: Nowhere — the sum is simply built wrongly. The $98 you owe already covers the $97 shirt plus the $1 in your pocket. You should add $97 + $3 = $100, never $98 + $1.
20. Divide 30 by half and then add 10. What is the answer?
Answer: 70. Dividing by half means dividing by 0.5, so 30 ÷ 0.5 = 60, and 60 + 10 = 70.
21. A clock takes five seconds to strike six o’clock. How long does it take to strike twelve?
Answer: Eleven seconds. Six strikes have five gaps, so each gap is one second; twelve strikes have eleven gaps.
22. You have a 3-litre jug and a 5-litre jug and no markings. How do you measure exactly 4 litres?
Answer: Fill the 5-litre jug and pour it into the 3-litre jug, leaving 2 litres. Empty the 3-litre jug, pour the 2 litres into it, then refill the 5-litre jug and top up the 3-litre jug — it only takes 1 more litre, leaving exactly 4 litres behind.
23. What is half of two plus two?
Answer: Three. Read literally, half of two is one, and one plus two is three. Most people silently reorder it into half of (two plus two).
24. A snail climbs a 10-metre wall. It climbs 3 metres each day and slips back 2 metres each night. How many days does it take to reach the top?
Answer: Eight days. It gains 1 metre a day, so it starts day 8 at 7 metres — and the 3 metres it climbs that day take it over the top before it can slip back.
25. Two fathers and two sons went fishing. Each caught one fish, yet only three fish were caught in total. How?
Answer: There were only three people: a grandfather, his son, and his grandson. The middle man is both a father and a son.
26. What number comes next: 1, 11, 21, 1211, 111221, ?
Answer: 312211. Each line describes the one above it out loud — 111221 is “three 1s, two 2s, one 1”.
27. If you multiply together every number printed on a telephone keypad, what do you get?
Answer: Zero. The keypad includes a 0, and anything multiplied by zero is zero.
28. Two trains are 100 miles apart on the same track, heading toward each other at 40 mph and 60 mph. How long until they meet?
Answer: One hour. They close the gap at 100 mph combined.
29. How many digits are needed to number the pages of a 100-page book from 1 to 100?
Answer: 192. Pages 1–9 use 9 digits, pages 10–99 use 180, and page 100 uses 3.
30. A brick weighs one kilogram plus half a brick. How much does the whole brick weigh?
Answer: Two kilograms. If b = 1 + b/2, then half a brick weighs 1 kg, so the brick weighs 2 kg.
12 Word and Language Trick Questions
This set plays on the gap between a word as a label and a word as a string of letters. The moment you start treating the question as being about spelling rather than meaning, most of them fall apart instantly. The skill being tested overlaps heavily with verbal reasoning, which is why these turn up so often in aptitude papers.
31. Which word in the English language is always spelled incorrectly?
Answer: “Incorrectly” — it is spelled i-n-c-o-r-r-e-c-t-l-y every time.
32. What five-letter word becomes shorter when you add two letters to it?
Answer: Short. Add “er” and it becomes shorter.
33. What begins with T, ends with T, and has T in it?
Answer: A teapot.
34. What four-letter word reads the same forwards, backwards and upside down?
Answer: NOON.
35. Which single word contains all 26 letters?
Answer: “Alphabet” — it contains them all by definition, not by spelling.
36. How many letters are there in “the alphabet”?
Answer: Eleven. The phrase “the alphabet” is made of eleven letters.
37. Which is correct: “the yolk of the egg is white” or “the yolk of the egg are white”?
Answer: Neither. Egg yolks are yellow.
38. What word is still pronounced the same when you remove four of its five letters?
Answer: Queue. Drop the last four letters and “q” sounds identical.
39. Forwards I am heavy, backwards I am not. What word am I?
Answer: Ton. Spelled backwards it reads “not”.
40. What seven-letter word has hundreds of letters inside it?
Answer: Mailbox.
41. Remove my first letter and I sound the same. Remove my last letter and I sound the same. Remove my middle letter and I am still the same. What word am I?
Answer: Empty. It is really just the letters M and T said out loud.
42. Which English word contains three consecutive double letters?
Answer: Bookkeeper — oo, kk and ee, one after another.
10 Attention-to-Detail Trick Questions
Here the answer is not hidden at all — it is stated openly in the question and your eye slides over it. These are the questions people get most annoyed about, because the moment you see the answer you cannot un-see it.
43. Count the Fs: “FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS.” How many are there?
Answer: Six. Most people miss the F in each “OF”, because the brain hears the word as a “v” sound and skips over it.
44. Mary’s father has five daughters: Nana, Nene, Nini and Nono. What is the fifth daughter called?
Answer: Mary. She is named in the first four words of the question.
45. You see a boat filled with people, yet there is not a single person on board. How?
Answer: Everybody on board is married, so nobody is single.
46. A woman shoots her husband, holds him underwater for five minutes, then hangs him. Half an hour later they sit down to dinner together. How?
Answer: She is a photographer. She shot a photo of him, developed it in water and hung it up to dry.
47. What is at the end of a rainbow?
Answer: The letter W.
48. How many animals of each kind did Moses take onto the ark?
Answer: None. It was Noah who built the ark.
49. If there are three apples on the table and you take away two, how many apples do you have?
Answer: Two — the two you took.
50. A man is found dead in the middle of an empty field with an unopened package beside him. What happened?
Answer: His parachute failed to open.
51. What do you call a boomerang that does not come back?
Answer: A stick.
52. Which is the only common English word that ends in the letters “-mt”?
Answer: Dreamt.
8 Hard Trick Questions That Stump Almost Everyone
The last eight are a genuine step up. Several require you to construct an entire scenario that was never described, rather than just correcting a single word. Give each one a full minute before reading the answer.
53. A man pushes his car up to a hotel, then tells the owner he is bankrupt. What is going on?
Answer: He is playing Monopoly.
54. Two people are born at the same moment to the same parents, but they are not twins. How?
Answer: They are two of a set of triplets — or quadruplets.
55. A man lives on the 20th floor. Every morning he rides the lift all the way down. Coming home he rides to the 10th floor and walks the rest — except when it is raining, when he rides all the way up. Why?
Answer: He is too short to reach the 20th-floor button. On rainy days he has an umbrella with him and uses it to press the higher button.
56. What can travel all the way around the world while staying in one corner?
Answer: A postage stamp.
57. A prisoner is told: “If you tell a lie we will hang you. If you tell the truth we will shoot you.” What can he say to survive?
Answer: “You will hang me.” If that is true they must shoot him, which makes it false; if it is false they must hang him, which makes it true. Neither sentence can be carried out.
58. You walk into a pitch-dark room carrying one match. Inside there is an oil lamp, a folded newspaper and a wood stove. What do you light first?
Answer: The match.
59. A sundial has the fewest moving parts of any timepiece. Which timepiece has the most?
Answer: An hourglass — it holds thousands of moving grains of sand.
60. What gets wetter and wetter the more it dries?
Answer: A towel.
How Did You Do? Score Yourself
Count one point for every question you answered correctly without reading the answer first. Partial credit counts if you had the right idea but phrased it differently — “the horse is called Friday” and “Friday is the horse’s name” are the same answer.
One honest caveat about scoring: a trick question you have seen before is no longer a trick question. If you scored highly because you recognised the classics, the useful measure is how you did on the sets you had not met. That is also why it is worth coming back to this page after a few months rather than a few days.
7 Techniques for Spotting a Trick Question
These are the habits that separate someone who scores 20 from someone who scores 50. None of them require you to be cleverer — only slower for about three seconds.
Those seven habits are worth practising on material you have not seen before. The 100+ brain teaser IQ questions set is a good next step because it mixes trick questions in among genuine reasoning problems, so you cannot tell in advance which kind you are facing — which is a much more realistic test than a page where you already know a trap is coming.
Summary
Trick questions are not a measure of intelligence, and anyone who tells you a score on this page reveals your IQ is selling something. What they measure is a habit: whether you read to the end of a sentence before deciding what it says. That habit is learnable in an afternoon and genuinely useful well beyond puzzles.
The three things worth taking away: first, almost every trick question contains its own answer, so the information you need is never missing. Second, the feeling of certainty is the trap — the questions that fool you hardest are the ones you were most confident about. Third, re-reading once before answering will move your score more than any other single change.
Come back to this page after a few weeks and try the sets you scored worst on. Trick questions are one of the few puzzle formats that get genuinely easier with practice, because you are not memorising answers — you are building the pause.
Frequently Asked Questions
What is the difference between a trick question and a riddle?
A riddle describes something in deliberately indirect language and asks you to name it; the challenge is interpretation. A trick question states everything plainly and relies on you misreading it; the challenge is attention. Riddles reward imagination, trick questions reward care.
Are trick questions a fair test of intelligence?
No, and they are not designed to be. They measure reading care and resistance to intuitive answers, which are useful traits but narrow ones. People with excellent reasoning ability routinely get the bat-and-ball question wrong, and getting it right mostly means you have met it before.
Why do so many people answer “ten cents” to the bat and ball question?
Because $1.10 splits neatly into $1.00 and $0.10, and your brain offers that split before it checks the condition. The question says the bat costs a dollar more than the ball, not that the bat costs a dollar. Checking takes two seconds, which is exactly two seconds longer than most people spend.
Can trick questions be used in job interviews?
They still appear, though good interviewers use them to watch your process rather than score the answer. If you meet one, restate the question aloud, name the assumption you are making, and then answer. That is the behaviour being assessed.
Are these trick questions suitable for children?
Most of them are — the classic, word and attention sets work well from around age eight upward, and the maths set suits older children. Our brain teasers for kids collection is graded by difficulty if you want material pitched at that age range specifically.
How can I get better at trick questions?
Practise on unfamiliar material rather than re-reading answers you already know, and deliberately apply the seven techniques above. The pause before answering is the whole skill; everything else follows from it.
Related Articles
- 100 Riddles for Adults With Answers — The closest sibling to this article. Riddles hide their subject behind metaphor where trick questions hide it behind careless reading — graded easy, medium, hard and lateral.
- 100+ Brain Teaser IQ Questions and Answers — A mixed set where trick questions sit alongside genuine reasoning problems, so you never know in advance which kind you are facing.
- 60 Pattern Recognition Questions With Answers — Number, letter and shape series. A completely different skill — finding the rule rather than catching the trap.
- 75 Brain Teasers for Kids With Answers — Family-friendly versions graded easy to hard, ideal for classrooms and car journeys.
- 50 Best IQ Test Questions With Answers — A broad sampler of the formats that appear on real IQ and aptitude papers.
- 20+ Logical Questions and Answers to Test Your IQ — Deduction problems with stated constraints — the format most likely to appear in competitive exams.
- Top IQ Questions to Ace Your Next Interview — What hiring managers actually ask, and what they are watching for when they ask it.
