Puzzles for grown-ups

Can you find the odd one out?

Most people need more than 20 seconds for the grid on the right. Try it, then move on to tricky riddles, spot-the-difference pictures and optical illusions that fool almost everyone.

Start the puzzle Try a riddle

One of these is not a B. Where is it?

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Riddles54 riddles in 5 levels, from easy to brain-bending. Odd one out20 grids. One symbol is different. Beat the clock. Spot the difference4 pictures, 5 differences each. Tap to mark them. Optical illusions10 illusions with a button that shows the truth.

Riddle of the day

Think you know the answer?

This one trips up a lot of smart people. Make a guess before you open the answer. More math riddles →

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?

Show answer

5 cents. (The bat costs $1.05.)

Three hard riddles

All hard riddles →

The more you take, the more you leave behind. What are they?
Show answer
Footsteps.
What can travel around the world while staying in a corner?
Show answer
A stamp.
I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?
Show answer
An echo.
Mary’s father has five daughters: Nana, Nene, Nini and Nono. What is the fifth daughter’s name?
Show answer
Mary.

Why puzzles?

Puzzles are a fun way to take a break, practice paying attention and challenge friends and family. Everything here works in your browser on a phone or computer.

All puzzles and pictures are made by the Brain Teaser Hub team.