100+ Brainteasers with answers for kids and adults

Brainteasers with Answers - "Challenge your brain and improve your problem-solving skills with our collection of brainteasers. From logic puzzles to wordplay, our brainteasers will keep you entertained and engaged for hours. Whether you're a student looking to boost your grades or an adult looking to keep your mind sharp, our brainteasers have something for everyone. Test your mental aptitude and see just how clever you are with our challenging and fun collection of brainteasers."

The Paradox of the Barber-brain teaser

1. Riddles
In a town, there is a barber who shaves everyone who does not shave themselves, but he does not shave those who do shave themselves. Does the barber shave himself?

    • This is a paradox. If the barber shaves himself, then he must not shave himself (because he shaves only those who don’t shave themselves). If he does not shave himself, then he must shave himself (because he shaves everyone who doesn’t shave themselves). The situation is logically impossible.

The Water and Wine Puzzle-brain teaserhaa

2. Riddles
You have two glasses, one filled with water and the other filled with wine. You take a spoonful of water and pour it into the wine glass, then take a spoonful of the wine-water mixture and pour it back into the water glass. Is there more water in the wine or more wine in the water?

    • The amounts of water in the wine and wine in the water are the same. The process of mixing and exchanging liquids balances out the quantities.

The Hourglass in a Box

3. Riddles
A box contains 10 different hourglasses, each with a different sand timer value. You randomly pick one hourglass, turn it over, and let it run out. What is the probability that you picked the hourglass that takes the longest time to empty?

    • 1. Start both hourglasses at the same time. 2. When the 4-minute hourglass runs out, flip it immediately. 3. When the 7-minute hourglass runs out, flip it immediately. 4. When the 4-minute hourglass runs out again (at 8 minutes), there is 1 minute of sand left in the 7-minute hourglass. 5. Let that 1 minute pass. You’ve now measured exactly 9 minutes.

28 days months-Brain Teasers

5. Riddles
In a year, there are 12 months. Seven months have 31 days. How many months have 28 days?
    • Answer: They all do.

A man and a photograph-Brain Teasers

6. Riddles
A man is looking at a photograph of someone. His friend asks who it is. The man replies, Brothers and sisters, I have none. But that man's father is my father's son. Who was in the photograph?
    • Answer: His son.

Job polish and herb-Brain Teasers

9. Riddles
What is special about these words: job, polish, herb?
    • Answer: They are pronounced differently when the first letter is capitalized.

The Manhole Covers-Brain teaser

11. Riddles
Why are manhole covers round?

    • Manhole covers are round so they can fall through the opening. A round cover cannot be turned sideways and dropped through its circular opening, unlike square or rectangular covers.

The Weight Puzzle-Brain teaser

12. Riddles
You have 12 identical-looking balls, but one is of a different weight (heavier or lighter). You have a balance scale and can only use it three times. How do you find the odd ball?

    • 1. Divide the balls into three groups of four.
2. Weigh two of the groups against each other:
   - If they balance, the odd ball is in the third group.
   - If they don? balance, the odd ball is in the heavier or lighter group.
3. Take the group with the odd ball and divide it into three. Repeat the weighing process.

The Water Jug Puzzle-Brain teaser

13. Riddles
You have a 5-liter jug and a 3-liter jug. Neither has any markings on it. How can you measure exactly 4 liters using these jugs?

    • 1. Fill the 5-liter jug to the top.
2. Pour water from the 5-liter jug into the 3-liter jug until it is full. This leaves you with 2 liters in the 5-liter jug.
3. Empty the 3-liter jug and pour the 2 liters from the 5-liter jug into the 3-liter jug.
4. Fill the 5-liter jug again and pour it into the 3-liter jug until it is full. Now you have exactly 4 liters left in the 5-liter jug.

The Unpredictable Elevator

14. Riddles
An elevator is on the 10th floor. It goes down 7 floors, then up 4 floors, then down 6 floors, then up 3 floors, then down 5 floors. On which floor is the elevator now?

    • The elevator is on the 1st floor. (Start at 10, then move down 7 to 3, up 4 to 7, down 6 to 1, up 3 to 4, and down 5 to 1.)

The Twins Puzzle-Brain teaser

15. Riddles
Two people born on the same day, from the same mother and father, but they are not twins. How is this possible?

    • They are part of a set of triplets (or more). They have other siblings born on the same day, which means they are not twins.