Can You Pass This Difficult Knowledge Test?

By: Annette

A person is acclimatized when they have adjusted to the temperature, altitude and other conditions in a location. Another word for this is acclimated.

The Eustachian tube is found in the middle portion of the ear. The tube is about 35 mm long in adult humans.

Honey is one of the only foods that never spoils. You could eat the ancient honey of our ancestors.

Only strawberries have seeds on the outside. These seeds are the fruit's ovaries, called "achenes."

In the sleeping state, you burn more calories than while you're awake and watching television. Go to bed earlier!

A bathyscaphe is a type of submersible vessel. It's the vessel that deep-sea explorer Auguste Piccard used.

The Milky Way Galaxy is disk-shaped. There's a rod at the center of it, and then a series of arms spiraling around it.

Lettuce is the only produce that is never frozen, canned, or preserved in any way. Just think of how gross canned lettuce would be!

Dr. Yoshiro Nakamatsu has invented over 3,500 things in our modern world. He is fighting cancer with many strategies, including singing to trigger cancer immunity in the brain.

Niagara Falls is constantly moving backward, due to erosion from the force of the water. It once eroded more than 3 feet per year, but with water diversion for hydro-electricity the falls now erode less than one foot per year.

The hyoid bone is located in the neck. It's the only bone not attached to another bone.

Portland, Oregon, is further west than Los Angeles. Reno, Nevada, is also slightly more to the west.

Both asparagus and rhubarb can reproduce on their own. Many other vegetables must be replanted each year.

There are 14 punctuation marks in English grammar. They are the period, comma, colon, semicolon, dash, hyphen, apostrophe, question mark, exclamation point, quotation marks, brackets, parentheses, braces, and ellipses. And then there's the interrobang.

The sperm whale is loudest, based on decibel levels. However, it's complicated, given questions of frequency and duration, plus sound in air vs. sound in water. Other candidates for the loudest include the sperm whale, pistol shrimp and bulldog bat.

Vatican City is the smallest country in the world. It measures only 0.2 square miles - smaller than Manhattan.

Believe it or not, one-quarter of your total bones are in your feet. Talk about a complex part of your anatomy!

All insects have six legs. They also, for the most part, have four wings.

Paris is actually north of the state of Maine. So is all of Great Britain.

Boxing is one sport where no one knows what the score is until the competition is done. No one knows who the technical leader is, either.

Alexander Graham Bell invented many things. These include a metal detector, hydrofoil and audiometer.

When you add up all those numbers consecutively, you come to 5,050. Go ahead and try it on a calculator.

The pilomotor reflex refers to the phenomenon of goosebumps raising on your skin. This can happen due to temperature​ or emotions.

Benjamin Harrison was the 23rd president of the United States. He was president from 1889 to 1893.

20°C translates into 68°F. This is the lower limit for what is defined as room temperature.

Florida is the southernmost state in the continental U.S. Miami is the southernmost major metropolis. Hawaii, which is a state but not part of the continental U.S., is further south.

Lewis Carroll, the author of "Alice's Adventures in Wonderland," was also its original illustrator. Carroll was a mathematician at the time.

About ten percent of humans are left-handed. Is it a myth that left-handed people are smarter? Don't ask a left-handed person.

Scientists estimate that there are 37.2 trillion cells in the human body. This will vary from person to person, of course.

An endocrinologist is a doctor that specializes in hormones. If you're suspecting low-T, he or she is the doctor to see.

There are a total of 31,536,000 seconds in each year, not counting leap years. That's 60x60x24x365! Let's make them all count, you genius you.

There are only 13 letters in the Hawaiian alphabet - five vowels and eight consonants. Communication is simple and easy when you're living the spirit of Aloha.

Astronomers estimate that there are 100 to 400 bbillion stars in the Milky Way alone. There are then countless other galaxies.

The general consensus is that Shakespeare wrote 37 plays. That being said, there are theories that he didn't write them all.

From Earth, it's possible to see as much as 59% of the moon's surface. It's thanks to slight lunar wobbling that we're able to see so much of it.

Explore More Quizzes

Image: Shutterstock

About This Quiz

Did you know that an IQ score of 130 is considered to be in the gifted range? It also means that one has a "very superior" quality of intelligence. Well, are you tempted to take a test to see if you're within that range? This quiz of ours will definitely help you with that! Ace it and you're in!

Studies show that 100 is the average IQ score in America. That falls somewhere in the middle of the normal range of 85 to 115 or 90 to 105, depending on which IQ classification system you follow. So someone with an IQ of 110 to 119 is on the high average scale, while someone in the 120s is within the superior range already. And anyone above 130, especially someone in the 140-plus range, is considered to be very gifted or highly advanced.

Regardless of where you fall in these IQ ranges, the general idea is that an average person could freely take this quiz and still ace it. Sometimes it all depends on the luck of the draw, since you can't really predict what kind of questions these quizzes will throw at you and how they will mesh with your personal knowledge base. So yes, wit and luck go together sometimes - and it doesn't take a genius to figure that out!

So do you want to see if you're Mensa-ready? Do you want to earn bragging rights? Take this quiz now and discover just how much you really know!

About HowStuffWorks Play

How much do you know about dinosaurs? What is an octane rating? And how do you use a proper noun? Lucky for you, HowStuffWorks Play is here to help. Our award-winning website offers reliable, easy-to-understand explanations about how the world works. From fun quizzes that bring joy to your day, to compelling photography and fascinating lists, HowStuffWorks Play offers something for everyone. Sometimes we explain how stuff works, other times, we ask you, but we’re always exploring in the name of fun! Because learning is fun, so stick with us!