This logic problem comes to us all the way from the 1930's, but was known in other versions long before that. Can you shed some light on the solution? Remember, you'll only have one guess so use it wisely! Think well of the question, and any pitfalls it might have, and then select the answer you believe to be correct. Don't worry, the whole thing will be explained to you if you don't get it right!
Why Did the Dog Chase His Tail? Come Find Out!
Enjoy a most laughable collection of dog-themed riddles that are paw-sitive to make you smile!
QUIZ: What Kind Mind Do You Have?
Do you think that you're a logical and reasonable person, who's able to come up with accurate estimates for everything? Find out here!
Murder Mystery: Killer Volunteers His Own DNA!
Murder is always awful, and sometimes perplexing, but in many ways this murder is most awful and perplexing of them all. A killer who volunteered his own DNA!
Are You Clever Enough to Crack the Passcode Riddle?
This riddle has been driving the internet crazy since summer. Are you one of the few who can crack this puzzle?
QUIZ: What is Your Animal Personality?
Are you a lion? A gorilla? Take our animal personality quiz and find out.
Test: Is Yours a Healthy Mind?
Is your mind still growing or is it stagnating, are you still able to think fresh thoughts, or does your mind need some refreshing? Take our test, and you may just find out
Have a Go at Solving These Tricky Murder Riddles
Halloween is just around the corner, so to get you in the mood, we've given you 11 murder riddles to solve. Do you think you have what it takes? Find out now.
Challenge: Can You Spot the Hiding Animal?
Sometimes, when we're not all that attentive, we can easily miss the wonderful things hidden in nature. Find out if you can spot the animals in the pictures.
Challenge: Think You Can Crack These 10 Riddles?
These challenging riddles ask one simple question: Are you a riddler?
Are You One of the 3% Who Can Really See This Image?
Can you see this image? Are you one of the lucky few?
Can You Guess These Ancient Riddles?
Can you solve these riddles thousands of years old?
These Illusions Will Have You Fooled... Discover Why!
Discover what's really behind these fascinating illusions.
What You See In These Images Will Tell You About Yourself
Many personality tests rely on your choices to determine your personality, but this optical illusion test will work entirely on your subconscious...
Can You Solve These Tricky Little Riddles?
While some of us are good at solving riddles, others are just not. How do you do? Here are 9 tricky little riddles to put your brains to the test.
10 Tricky Riddles That Could Potentially Drive You Crazy!
Here are 10 tricky riddles that you might find challenging to solve...
Challenge: Can You Solve These 10 Tricky Riddles?
These ten challenging riddles will leave you scratching your head.
These Riddles Will Really Mess With Your Brainbox!
If you're feeling like a smarty pants today, then we've got one heck of a treat in store for you, since these riddles will test your mental capacity to the max!
You Don't Genius to Solve This, But it Surely Helps!
This isn't just another easy test - can you crack it?
Is Your Mind as Sharp as a Knife? Try These Brain Teasers!
These addictive brain teasers will really get the cogs in your head turning!
Test Your Mental Sharpness With These Brainteasers
See if you can figure out all of these brainteasers without peeking at the answers.
Only a Few People Can See What's Hiding in This Image
What hides behind this red circle? Only a few can tell...
These Riddles Have Simple Answers, But Can You Find Them?
These riddles all have very simple answers, but may not be as easy to solve as they appear.
Challenge: Can You Solve the 4 Square Riddle?
To solve this riddle, you must forget what you think you know...
Only 2% of People Can Solve This Riddle! Can You?
According to the great Albert Einstein, only 2% of the world's population can solve this riddle by themselves. Are you one of them?
How Many of These Clever Riddles Can You Answer?
How many of these riddles can you guess?
Can You Solve These 9 Challenging Riddles? Give it a Go!
If you love yourself some challenging riddles, you should definitely give these 9 a try.
Can You Solve These 16 Perplexing Riddles?
There's no better brain workout that trying your hand at a few riddles.
Can You Solve These Fun Brainteasers?
Brainteasers are a great way to dust off your critical thinking skills. Here are 10 logic brainteasers that will either stump or stun you!
Can You Solve These 8 "Mind Blowing" Riddles?
These riddles will show you that brain-teasing isn't just for kids. Do you have what it takes to solve these 8? Give them a go to find out!
10 Fun Visual Brain Teasers You Will Want To Share
Brains need exercise just as much as muscles do. Challenge yourself with these 10 fun observation tests.
Put Your Thinking Cap on and Try to Solve These Riddles
These 12 fun riddles will show just how sharp your mind is.
Can You Solve These 10 Tricky Riddles? Give It a Go!
If you love to test yourself with challenging riddles, then give these 10 a go!
Quick Test: Choose an Eye and Discover More About Yourself
The eyes are a window to the soul - choose yours and see what it says about you.
These 8 Fun Riddles Will Test You to the Max!
Do you think you're a riddle brainbox? If so, give these 8 tricky riddles a try!
Brain Buster Challenge: Solve These Riddles!
These tricky riddles are a great way to get your mind thinking. Do you have what it to solve them?
Challenge: Think You Can You Crack These 5 Math Riddles?
Test your math knowledge with these 5 fun math riddles.
Riddle Me This: Test Your Logic by Solving Riddles!
These tricky riddles are not only fun but also will test your brain - give them a go, and see if you can solve them all!
Can You Guess the Answers to These Riddles About Nature?
Nature isn't just the inspiration for conventional forms of art, it can also be a great way to challenge your mind when phrased as riddles
Challenge! Can You Solve These 7 Tricky Riddles?
These riddles will challenge your mental sharpness and will definitely keep you on your toes.
This Riddle Proved Too Hard For Me, Can YOU Solve It?
Are you clever enough for this riddle?
Challenge: Are You Clever Enough For This Riddle?
A simple riddle that will drive you crazy!
Massive Riddle Collection: 120 Tricky Riddles to Test You!
Here is our enormous collection of 120 tricky riddles with answers that will definitely make you put your thinking cap on!
Let's Play a Game: Spot the Doubled Animal!
Are you ready for a quick game of wits? Let's see how fast you can locate the animals that appear twice in this game!
Can You Correctly See What's Hidden in These Images?
Can you see what's really hidden in these images? Click on each one to find the answer.
PUZZLE: Can You Find all the Hidden Words in the Picture?
Picture puzzle with six hidden words
Can You Crack Our Riddles? Give it a Try!
Give your brain a work out with these difficult riddles. Our tip - Think outside the box!
12 Mysterious Riddles That'll Boost Your Mental Capacity
These 12 great riddles will definitely get your brain cells flexing and strutting their stuff in no time at all. Come on, give them a go!