100+ Brain teasers 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."

28 days months-Brain Teasers

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

The Paradox of the Barber-brain teaser

3. 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.

Job polish and herb-Brain Teasers

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

The Missing Square Puzzle-Brain teaser

7. Riddles
A large square is cut into four pieces, which are then rearranged into a rectangle. The area of the rectangle appears to be missing a square unit. Where did the missing square go?

    • This is an optical illusion. The rearrangement causes a very slight change in the angles of the pieces, which leads to the appearance of a missing square. The total area hasn't changed, but the illusion tricks the eye into thinking a square unit has disappeared.

A man and a photograph-Brain Teasers

8. 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.

The Weight Puzzle-Brain teaser

9. 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 Unpredictable Elevator

10. 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

11. 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.

The Water Jug Puzzle-Brain teaser

12. 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 Manhole Covers-Brain teaser

13. 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 Speeding Train-Brain teaser

14. Riddles
A train 1 mile long is traveling at a speed of 1 mile per minute through a tunnel 1 mile long. How long will it take for the train to completely pass through the tunnel?

    • It will take 2 minutes. The front of the train takes 1 minute to exit the tunnel, but the back still needs another minute to completely pass through.

The Chessboard Puzzle-Brain teaser

15. Riddles
A chessboard has 64 squares. If you remove two opposite corner squares, can you cover the remaining 62 squares with 31 dominoes, each covering exactly 2 squares?
    • No, you can. Each domino covers two adjacent squares of different colors, but removing two opposite corners removes two squares of the same color. This leaves an odd number of squares of each color, making it impossible to cover them evenly with dominoes.