### Fun Facts (Hints)

Here are a few facts about logical thinking. They may be able to help you in solving a few of these riddles:
Logic has a few definitions, but is most known as the study of reasoning.
Logic is used everyday in areas like mathematics, computers, and philosophy.
The word logic is derived from the Greek word "logos."
The creation of the study of logic is often attributed to Aristotle.
Aristotle's study of logic has had a tremendous impact on the history of the world.

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## Rope Burn Riddle

You have two ropes. Each rope takes one hour to burn. These ropes are not identical, nor are they uniform; i.e. it does not necessarily take half an hour for half the rope to burn (if you have trouble visualizing this, imagine a rope of varying thickness across its length). With only these two ropes and a way to light them, how do you measure out 45 minutes?

Hint: You can light multiple ends and/or multiple ropes at the exact same time.

Light both ends of one rope, and only one end of the other rope. This will cause the first rope to burn out in 30 minutes. When the first rope burns out, there will be 30 minutes left on the second rope. So then, light the other end of the second rope, and the rest of it will burn out in 15 minutes. 30 + 15 = 45 minutes.

YES NO

*Did you answer this riddle correctly?*YES NO

## Rooster On Top Of A Roof

Hint:

## Drinking Soda Riddle

In a restaurant drinks are served as per the name of the person.

Elizabeth, George, and Steve are drinking coffee.

Becky, Melissa, and Eva are drinking soda.

Using logic, is Helen drinking coffee or soda?

Elizabeth, George, and Steve are drinking coffee.

Becky, Melissa, and Eva are drinking soda.

Using logic, is Helen drinking coffee or soda?

Hint:

Helen is drinking coffee. Logic : People drinking coffee have two Es in their name

YES NO

*Did you answer this riddle correctly?*YES NO

## Pound For Pound Riddle

Hint:

## 6 Girls Riddle

Hint:

## Fruit Friends Riddle

If you and a friend have the same amount of apples, how many does she need to give you in order to have 10 more apples than her?

Hint:

She will always need to give you 5 apples. You both need at least 5 apples to begin with, but apart from that it doesnt matter exactly how many you each have. When she gives you 5 you will have 10 more than her because she will lose 5 and you will gain 5, resulting in a net difference of 10.

For example, if you each have 25 apples and she gives you 5 of hers, she will be left with 20 and you will now have 30, precisely 10 more than she has.

YES NO

For example, if you each have 25 apples and she gives you 5 of hers, she will be left with 20 and you will now have 30, precisely 10 more than she has.

*Did you answer this riddle correctly?*YES NO

## Throwing A Ball Riddle

What is the easiest way to throw a ball, and have it stop, and completely reverse direction after traveling a short distance?

Hint:

What is the easiest way to throw a ball, and have it stop, and completely reverse direction after traveling a short distance?

YES NO

*Did you answer this riddle correctly?*YES NO

## Ready For Takeoff

Two jets take off at the same time. There is only one runway but there where no crashes and it was at the same airport. A plane takes more than 1min to take off. How can this happen?

Hint:

## Opening Doors Riddle

While driving his car a man slams on the brakes when he sees, in the middle of the street, a diamond studded door, a gold door and a silver door. Which door does he open first?

Hint:

## Switch Or Stick Riddle

There are three doors: Door 1, Door 2, and Door 3. Behind one of these doors lies eternal bliss, but behind the others lies eternal despair. You are allowed to choose any door, and you pick Door 1. Suddenly, Door 3 is swung open and revealed to be despair! You are give another choice: you may stick with the door you chose (1) or switch to the other (2). What should you do?

Hint:

The answer may surprise you: switch. Due to something called the Monty Hall Paradox, you will statistically have a better chance of making the "correct" choice. The concept is as follows:

Door 1 Door 2 Door 3

All have an equal chance to be correct:

Door 1: 1/3 Door 2: 1/3 Door 3: 1/3

After choosing Door 1, the remaining two have a 2/3 chance of containing the right choice:

Door1: 1/3 Doors 2 3: 2/3

If Door 3 is removed, the probability does not shift to 50:50. Instead, it is:

Door 1: 1/3 Door 2: 2/3

Thus, you should switch.

YES NO

Door 1 Door 2 Door 3

All have an equal chance to be correct:

Door 1: 1/3 Door 2: 1/3 Door 3: 1/3

After choosing Door 1, the remaining two have a 2/3 chance of containing the right choice:

Door1: 1/3 Doors 2 3: 2/3

If Door 3 is removed, the probability does not shift to 50:50. Instead, it is:

Door 1: 1/3 Door 2: 2/3

Thus, you should switch.

*Did you answer this riddle correctly?*YES NO

## Post Your Logic Riddles Below

Can you come up with a cool, funny or clever Logic Riddles of your own? Post it below (without the answer) to see if you can stump our users.