78 Hard Riddles (With answers) -Wanna challenge your Brain?

Hard Riddles (With answers) – Do you dare to challenge your Brain?

Looking for short hard riddles with the answers to challenge your brain? Welcome to this collections of hard riddles for adults (some of them are also OK for kids) that will make you look smarter in front of your friends and family – if you never tell them you had to read the answers, of course.

I love to learn new things in a funny and entertaining way. During some years, I used to teach kids, and playing games was the most effective way they learn. Also in the adult life, when you are having a good time you will retain the information longer.

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So, wanna start learning in a riddle-culously funny way? Let’s see how many of this brain teasers you can answer correctly!

For entertainment purpose, we hide the answer for riddles. Just click the button and the answer will show so can check if you were right.

Riddles for adults

Starting with short riddles for adults that are quite easy. The level will be increasing with your scrolling, so let’s see how many of them you can answer right. Ready?

Read: Here you have more riddles for adults.

What begins with T,
finishes with T,
and hast T i in?

Answer: ...
Teapot


I’m as hard as a rock, but I melt immediately in hot water. What am I?

Answer: ...
Ice


What starts with a P, ends with an E and has thousand letters?

Answer: ...
Post office


What English word has three consecutive double letters?

Answer: ...
Bookkeeper


What can you hold without ever touching or using your hands?

Answer: ...
Promises


What is the name of the writing system used by people who are visually impaired which uses raised dots to express words?

Answer: ...
Braille


What occurs once in a minute,
twice in a moment,
and never in a thousand years?

Answer: ...
M


In what year did Neil Armstrong and Buzz Aldrin land on the moon?

Answer: ...
1969


In what year did Neil Armstrong and Buzz Aldrin land on the moon

Easy riddles

These easy riddles are here to build your self-stem (or your knowledge if you fail, do not get discouraged if you do not know the riddle answers).

Read: easy and hard riddles for kids

I am black when you buy me and red when you use me.
When I turn gray, you know it’s time to throw me away.
What am I?

Answer: ...
Charcoal


I am hot and I live in the sky.
Who am I?

Answer: ...
The Sun


Four legs up, four legs down, soft in the middle, hard all around.

Answer: ...
Bed[/hide

Does the fire move faster moving up or down?
[hide]Up



I add lots of flavor and have many layers,
but if you get close I’ll make you cry.
What am I?

Answer: ...
An Onion


Which gender of mosquito bites humans? (Males/ Females)

Answer: ...
Females


Read: animal riddles

What has teeth but cannot bite?

Answer: ...
A comb


What has teeth but cannot bite - hard riddles

Tricky riddles with answers

Our brains always appreciate a bit of exercise. In addition, the tricky riddles with answers are an exceptional hobby for adults. Don’t be shy, share it with your office friends and see how many of them can get the answers correctly.

I touch the Earth, I touch the Sky
But if I touch you once,you’ll surely die.
What am I?

Answer: ...
Lightning


There was a plane crash in which every single person was killed. Yet there were 12 survivors. How?

Answer: ...
They were married, not single


What is Australia’s capital?

Answer: ...
Canberra


What is the largest ocean on Earth?

Answer: ...
Pacific Ocean


I make two people out of one. What am I?

Answer: ...
A mirror


What is the largest freshwater lake in the world?

Answer: ...
Lake Superior


What is the largest freshwater lake in the world?

Funny riddles in English with answers

Humor and riddles are even better! Don’t you think? That is why I wanted to add some funny hard riddles that you can share.

What is the name of the deepest blue hole in the world?

Answer: ...
Dragon hole


When things go wrong, what can you always count on?

Answer: ...
Your fingers


What goes up and down without moving?

Answer: ...
Stairs


Are all goldfish actually gold?

Answer: ...
No


What catch phrase is most commonly associated wit the actor Arnold Schwarzenegger?

Answer: ...
I’ll be back


Can you actually see a black hole?

Answer: ...
No


What movie is this quote from:
You have forgotten who you are and also have forgotten me…
You are more than what you have become.

Answer: ...
Lion King


I am seven letter word. I am very heavy.
Take away two letters from me and you will get 8.
Take away one letter and you will get 80. Who am I?

Answer: ...
Weighty


Which Michael Jackson song is Zayn’s favorite song of all time?

Answer: ...
Thriller


Which Michael Jackson song is Zayns favorite song of all time

Hard riddles with simple answers

Let’s go to more complicated really hard riddles… Even though the answers might be simple, you’ll have to use your brain.

I drive men mad for love of me, easily beaten, never free.

Answer: ...
Gold


What continent was Algebra discovered in?

Answer: ...
Asia


What kind of frequencies are too hight to be heard by humans?

Answer: ...
Ultrasonic


Why is there a hole in airplane windows?

Answer: ...
To balance air pressure


What country named their national capital after US president Monroe?

Answer: ...
Liberia


While rabbits have a nearly 360º vision, where is their optical blind stop?

Answer: ...
Directly in front of them


True or false: Tidal Waves and Tsunamis are the same thing.

Answer: ...
False


What city installed the first electric traffic light in the world?

Answer: ...
Cleveland, Ohio


What Shakespearean play is Lion King based on?

Answer: ...
Hamlet


Approximately, what percent of volcanic activity world wide occurs underwater?

Answer: ...
80-90%


What year was the first Thanksgiving?

Answer: ...
1926 (Although, it was first officially documented in 1623).


What is the tallest building in the world?

Answer: ...
Burj khalifa, in Dubai (828 meters)


Who stated this quote:
“It’s not the years in your life that counts. It’s the life in your years.”

Answer: ...
Abraham Lincoln


What is the name of the stone that helped decode Egyptian Hieroglyphics?

Answer: ...
Rosetta Stone


Egyptian Hieroglyphics

Super hard riddles

Already done all the riddles and looking for a harder challenge? Here you go, try our insanely hard riddles.

If you sum every positive number (integers), what does it equal?
1+2+3+4+5+6+7…

Answer: ...
Both are correct: Infinite (due to the series increasing) & -1/12 (if you follow the Riemann zeta function)


How long is a full year around earth (precisely)?

Answer: ...
365.2422 days


What is the probability of finding a 4 leaf clover?

Answer: ...
1/10.000


What’s the largest species of jellyfish known to humans at this time?

Answer: ...
Lion’s mane Jellyfish


What is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder?

Answer: ...
2520


What’s the name of the volcano famously erupting “blue” lava?

Answer: ...
Kawah Ljen


What Caribbean island holds the shortest runway in the world?

Answer: ...
Saba Island (Airport name: Juancho E. Yrausquin Airport)


What is the name of a specialized cell transmitting nerve impulses?

Answer: ...
Neuron


Find the unknown values in the following image

Hard riddle - Math

Answer: ...
A = 9, B= 1


How fast do humans sneeze? (Mph or km/h)

Answer: ...
100mph or 160km/h


What is the academic study of the form, meaning, and use of words?

Answer: ...
Lexicology


A person who does stats for a career is called a…

Answer: ...
Statistician


Which whole number can’t be written with Roman Numerals?

Answer: ...
0


What’s the name of the northernmost region of Canada?

Answer: ...
Cape Columbia


What's the name of the northernmost region of Canada

What academic discipline deals with the study of “structure of music”?

Answer: ...
Music theory


The first two letters signify a male,
the first three letters signify a female,
the first four letters signify a great,
while the entire world signifies a great woman.
What is the word?

Answer: ...
Heroine


I have five letters.
I sound the same when you remove my first letter.
I sound the same when you remove my third letter.
I sound the same when my last letter is removed and I sound the same when all three are removed.
What word am I?

Answer: ...
Empty


Summary

Did you enjoy the riddles that are hard? Personally, solving these hard riddles in a group is more enjoyable, you could compete to see who can guess the solution first. If you want to look smarter in front of a new group, you could learn the tricky riddles answers by heart and then challenge whoever you want to solve them. Always a good way to find new (smart) friends, don’t you think?

How many of these riddles did you solve correctly? Do you have a favorite one yet? Tell us in the comment section below!

Also, we have joke compilations that you might want to check out:

Julia
I am Julia, I love to laugh and I love to make people laugh.