Only Geniuses Can Pass This Logic Quiz. Can You?


By: Olivia Cantor

6 Min Quiz

Image: shutterstock

About This Quiz

Are you great at logic? This quiz can help determine how logical your thought process is and how your brain handles a challenge. Yes, it's also a game for the geniuses among us -- and that might be you. 

Logic has been defined as "the science that investigates the principles governing correct or reliable inference." That means a highly logical person can see the truth of things when presented with a scenario or challenged with a situation. That's why logic tests are often formulated in storytelling fashion. In this one, we'll provide the premise of the story, leave a question hanging, and then it's up to you to figure out the answer -- the next step in the story. 

Another definition of logic is "a particular method of reasoning or argumentation." While it closely resembles the storytelling mode of some logic quizzes, this is where a more "linear" or straightforward type of questioning occurs. So here, you'll also see questions that relate to math or allude to numbers, as well as abstract reasoning. 

Whether it's a combination of inference, argument, or reasoning, this quiz tests multiple skills to discover if your logical reasoning is on par with geniuses. Are you up for the challenge? Let's find out!

On my way to the cinema house, I saw Hannah and her 3 sisters, the 12 brothers Karamazov, and the 7 brides for the 7 brothers. How many people were going to the cinema house?

The answer is 1. Since it was only the speaker "I" who was going to the cinema house, then it's just 1!


Jane’s father has 4 daughters. The eldest child is Joy, the second's name is Happy, and the third's name is Glee. What is the name of the youngest child?

The youngest should be Jane. Since her father has 4 daughters, it's only her name that's not mentioned in the "roll call."


Hidden inside the name Tom Marvolo Riddle is an anagram of which Harry Potter villain?

An anagram forms a new word/phrase when you rearrange it. Therefore, "I am Lord Voldemort" is hidden within that anagram of a name of Tom Marvolo Riddle.


All spiders are poisonous. A tarantula is a spider. Therefore, ___?

If we follow the syllogism of this question, the answer would be "A tarantula is poisonous." It's the valid conclusion proposed from the two valid premises given.


Fill in the blank: 1C 2D 3E 4F __

Follow the numbers and you get 1-4 while you get C-F when you follow the letters. Therefore, the next number is 5 and the next letter is G -- 5G.


"Fork" is to "road" as "silver lining" is to "___"

"A fork in the road" is an idiomatic expression. "Every cloud has a silver lining" is also an idiomatic expression


Fill in the blank: May the __ be with you!

May the Force be with you! No amount of confusing homonyms would steer a Star Wars fan away from that quote!


Two cars crash along the border of North and South Korea. Where should they bury the survivors?

When a car crash has survivors, that means those people are still alive and should most definitely not be buried anywhere.


Father = Male. Mother = Female. Niece = Female. Nephew = __?

A nephew is the male counterpart of niece.


Fill in the number that comes next in this series: 11, 22, 44, 55, __, 88

It's 77. See how 33 is omitted, so 66 will be omitted as well, before reaching 88. Or you could notice the pattern seems to be alternating between numbers that are 11 and 22 apart.


Chris is your mother’s child. But Chris is not your brother. What is Chris’ relation to you?

Chris is not an uncommon female nickname. It could be short for Christina, Christine, or Christy, for example.


What word am I? My 1st letter is the same as that of Harry Potter’s female best friend's name; my 2nd letter is the 1st letter of the name for the U.S. president’s round room of work in the West Wing; my 3rd letter is the 13th letter of the alphabet; and my 4th letter is the most common letter in the English language (and this paragraph).

Home is where the heart is. It's also the answer to this question.


From a dozen roses, you take 3 out of 12. How many roses do you now have?

You now have 3 roses at hand, because that's what you took!


What is the palindrome of "live evil"?

A palindrome is a word or phrase that reads just the same if you flip it from end to beginning. Therefore, the palindrome is the same forwards or backwards -- live evil.


Which town building has the most stories - the mayor’s office, the bank, the school, or the town library?

The library should have the most number of stories in a given town. We're talking of stories found in books, both fiction and nonfiction, not the number of floors of a building.


Which is heavier, a pound of wet leaves or a pound of dry branches?

A pound is a pound is a pound. Whatever it is measuring, it's the same weight if it's just the same unit of measurement!


Upon God’s orders in the Bible, how many pairs of 4-legged land animals did Abraham take on the ark?

Noah, not Abraham, was said to have built the ark and loaded it up with animals. Therefore Abraham took zero animals.


What number comes next in the sequence: 12, 13, 15, 17, 21, __

If you take prime numbers starting from 2 and add 10, you get the numbers in the sequence. Therefore, the last prime number here is 17, which becomes 27 if you add 10.


Martha’s pink house is pink while Cheryl’s blue house is blue. What is the color of Mark’s greenhouse?

A greenhouse is made of glass, therefore it is transparent and has no color. It's not like a real house, if you know your gardening science.


How many eggs can a rooster lay in one day?

A rooster doesn't lay eggs at all. It's the hen that does that.


January, May, October and December each have 31 days, while June, September and November all have 30 days. Which months have 28 days?

All months have 28 days. Only February doesn't exceed this, but the others reach either 30 or 31.


If it rains outside, then the ground will be wet. The ground is wet. Therefore...

Based only on the premises, it's impossible to know whether or not rain is the cause of the wet ground. Sometimes human intuition tells us that this argument is valid (sometimes written as "If A, then B. / B [is true], therefore A [is true]"), but it's invalid. The correct logic is "If A, then B. A is true, therefore B must also be true."


If you were born in a leap year, how many birthdays could you have?

Everyone only has 1 birthday, regardless of when you were born. Yep, we're only born once!


Tony the librarian has 12 rare print books. All but 3 burned in a fire. How many were left?

All but 3 books burned. Therefore, only those 3 were left!


No dogs have scales. Archie is a dog. Therefore, __.

"Archie doesn’t have scales" should be the logical conclusion to this argumentation. Yep, it's logical!


If you take away 1 from 19, you will have 20 left. How can this be logical?

If you use Roman numerals, this statement is logical. In Roman numerals, you write 19 as XIX, and if you take away 1, or I, then you're left with XX, which is the Roman number for 20.


Say silk silk silk silk silk! Now tell me: What does a cow drink?

The "silk" portion should redirect your brain to say "milk." But what a cow drinks is water.


Reese Witherspoon's is quite long, but Megan Fox's is quite short. Meanwhile Madonna doesn't seem to have one, officially, while performing. What is it?

The question pertains to the surnames of the ladies. Officially, Madonna doesn't really use her last name, but of course legally she has one!


Which animal doesn’t belong in the series: Fish, frog, turtle, pigeon

A pigeon is warm-blooded, which makes it the odd one out on the list full of coldblooded creatures.


Mary Poppins sings a happy song with a very long title. How do you spell it?

Did you miss "it"?


Johnny was standing outside his house when it suddenly rained, but his hair didn't get wet. He wasn't carrying an umbrella, and he didn't have a hat, too. How can this be logical?

Johnny is bald. That's why there's no hair to get drench in the rain.


Fill in the blank: Go __ and multiply.

Forth should be the reply. Always be careful of homonyms or words that sound the same -- or almost!


If a = 1 and b = 5, what is the answer to a + b - ab?

In mathematical notation, if you put two variables next to each other, they're multiplied. So "ab" would equal 5, and 6 minus 5 equals 1.


Sheila's parents have 5 children: Sam, Sem, Sim, Som, and __. What's the name of the 5th child?

Sheila should be the 5th child. The other 4 are her siblings.


If silver : spoon, then __ : hot.

Being born with a silver spoon and being red hot are two examples of hyperbole. It could also be symbolism, depending on usage.


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