Mental Floss
The black hole in this optical illusion isn't really expanding, but your brain might assume otherwise.
Michele Debczak|
Celebrate 70 years of Queen Elizabeth II with this brainteaser featuring some of her favorite things.
Michele Debczak|
Marriage can often be puzzling, but this brainteaser takes it to another level.
Jake Rossen|
Being able to find your actual motorcycle helmet in your own messy garage is a key part of motorcycle safety.
Ellen Gutoskey|
Finding the engagement ring in this hidden image puzzle might be easier than finding the perfect time to propose.
Ellen Gutoskey|
Read on to discover which American president wanted to be a concert violinist, which carried a dictionary around in his pocket, who burned his official White House portrait, and why Joe Biden's dog made history.
Corinne Cummings|
Numbers are hard.
Alvin Ward|
If you’ve been attending weddings this year nonstop, you should ace this hidden-image puzzle.
Michele Debczak|
This hidden image puzzle from the Hungarian artist Dudolf contains a secret mouse in a crowd of squirrels.
Michele Debczak|
There's a doe hiding in this hidden-image brain teaser puzzle. Can you find it without looking at the solution?
Michele Debczak|
‘Jipper’ is hidden somewhere in this letter grid—and you’ll probably find some at Thanksgiving dinner, too.
Ellen Gutoskey|
You'll need some serious owl eyes to solve this hidden image brainteaser by Gergely “Dudolf” Dudás.
Jennifer M Wood|
To prepare yourself for the mess you’ll find after making ham, latkes, or figgy pudding, check out this holiday hidden-image puzzle.
Michele Debczak|
In this Christmas hidden object brainteaser, Hungarian artist Dudolf has concealed a single sheep amid a flock of Santas.
Jennifer M Wood|
This puzzle should satisfy your urge to snoop for presents until the holidays arrive.
Michele Debczak|
Less than 1 percent of people surveyed got a perfect score on this free online color perception test. Take it to see where you rank.
Michele Debczak|
Using these 15 clues, see if you can figure out the answer to Albert Einstein’s famously tricky house riddle.
Michele Debczak|
Do you think you have a photographic memory? Prove it! Take this interactive online test and see where you score.
Garin Pirnia|
When it comes to popping the question, timing is everything—and this hidden image puzzle is a good reminder.
Michele Debczak|
A snail and slug are hidden in this vibrant scene. Can you spot them?
Michele Debczak|
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