Biology is the study of life in all its splendid variation. From the smallest cells to the largest beasts, biology sheds light on the miracle that is biological life. A little knowledge of biology can go a long way to helping out with many situations. So how about you? Do you think you remember some basic biological knowledge? Prove it by acing our test!
Science Quiz: Think You Can Beat 15 Questions?
This test was passed by most 8th grade science students - can you do the same and answer all 15 questions?
Take Our Quiz: Do You Know Basic Physics?
A quiz to test your knowledge and/or memory of basic physics!
QUIZ: Do You Remember Your Basic Chemistry?
Are you ready to challenge yourself in the field of basic chemistry? Let's see how you do with our basic chemistry quiz.
QUIZ: Can You Beat This Biology Test From 1994?
Can you get more than 10 in this 1994 biology exam?
QUIZ: Do You Know About the Great Science Discoveries?
Take our quiz and see if you can recall the great inventions that made our lives better.
QUIZ: Can You Answer All of These Trick Questions?
Knowledge is a tricky thing. You can easily be deceived into thinking you know something you really don't. This trick question quiz is sure to throw you!
Challenge: Think You Can You Crack These 5 Math Riddles?
Test your math knowledge with these 5 fun math riddles.
Can Spot the Difference in These Brain-teasers?
Are you good at brain-teasers? If you think so, then you should really take on these 8 awesome brain-teasing images by Gergely Dudás.
Challenge! Can You Solve These 7 Tricky Riddles?
These riddles will challenge your mental sharpness and will definitely keep you on your toes.
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!
Challenge: Think You Can Crack These 10 Riddles?
These challenging riddles ask one simple question: Are you a riddler?
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?
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!
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 10 Tricky Riddles? Give It a Go!
If you love to test yourself with challenging riddles, then give these 10 a go!
Only a Few People Can See What's Hiding in This Image
What hides behind this red circle? Only a few can tell...
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!
Put Your Thinking Cap on and Try to Solve These Riddles
These 12 fun riddles will show just how sharp your mind is.
This Riddle Proved Too Hard For Me, Can YOU Solve It?
Are you clever enough for this riddle?
Can You Guess These Ancient Riddles?
Can you solve these riddles thousands of years old?
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.
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!
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 9 Challenging Riddles? Give it a Go!
If you love yourself some challenging riddles, you should definitely give these 9 a try.
Challenge: Can You Find the 6 Hidden Words in this Drawing?
Hidden in the image are six words that have been concealed. Only about 33% of adults will be able to find them all, making it one tough puzzle to complete.
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!
Challenge: Can You Solve the 4 Square Riddle?
To solve this riddle, you must forget what you think you know...
Give Your Brain a Good Workout 10 Tricky Riddles!
These 10 challenging riddles will give your brain the exercise that it requires.
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...
You Don't Genius to Solve This, But it Surely Helps!
This isn't just another easy test - can you crack it?
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 Crack These Challenging Animal Riddles?
How well do you know the animal world? Can you crack our riddles and guess the animal in this collection of animal riddles?
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 10 Tricky Riddles?
These ten challenging riddles will leave you scratching your head.
10 Challenging Riddles to Test Your Thinking Skills
These brain-teasing riddles will definitely test your lateral thinking skills. So, get those cogs working and try to answer all 10!
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.
Are You One of the 3% Who Can Really See This Image?
Can you see this image? Are you one of the lucky few?
Spot the Differences & Test Your Observational Skills!
Only the most observant of people can find all the differences between these images. Are you one of that select band of clever clogs?
Challenge: Can You Crack These 10 Riddles?
Can you crack these 10 challenging riddles?
Can You Count All the Tigers Hiding in This Photo?
It might look like there are but 4 tigers in this image, but there are a lot more. How many can you find? Click on the image to see how many there are.
Test Your Mental Sharpness With These Brainteasers
See if you can figure out all of these brainteasers without peeking at the answers.
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.
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!
10 Tricky Riddles That Could Potentially Drive You Crazy!
Here are 10 tricky riddles that you might find challenging to solve...
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.
How Many of These Clever Riddles Can You Answer?
How many of these riddles can you guess?
These Illusions Will Have You Fooled... Discover Why!
Discover what's really behind these fascinating illusions.