The Average of Three

There are three numbers. The first two are 2/3 and 3/4.

What does the third number have to be to make the average of all three be 2?

4 7/12

In order for the average of three numbers to be 2, they must all add up to 6. That gives you this equation:
2/3 + 3/4 + n = 6

Solve for n = 55/12, or 4 7/12.

Posted in Brain Teasers

What State Is Round On One Side

What state is round on one side, high in the middle, and round on the other side?

Ohio. This one works a little better when spoken rather than read, but O is round, hi sounds like high and the last O is as round as the first.

Posted in Riddles

Roads Without Cars

Where will you find roads without cars, forests without trees and cities without houses?

On a map.

Posted in Riddles

Border Plane Crash

A plane crashed on the border or US and Canada. Where do they bury the survivors?

Nowhere, you don’t bury survivors.

Posted in Brain Teasers

Ten More Apples

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?

She will always need to give you 5 apples. You both need at least 5 apples to begin with, but apart from that it doesn’t 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.

Posted in Brain Teasers

Black When Clean and White When Dirty

What is black when it’s clean and white when it’s dirty?

A chalkboard (or blackboard). It’s solid black when clean, and as you write on it with white chalk it becomes dirty.

Posted in Riddles

A Perfect Gentleman

He was the perfect gentleman even though his nephew couldn’t see it. Who was he?

A fine chap with a blind nephew (or an exemplary uncle who died before his nephew was born).

Posted in Brain Teasers

Going the Wrong Way on a One-Way Street

Noreen doesn’t have a driver’s license and goes the wrong way on a one-way street, then turns left at a corner with a “No left turns” sign. A policeman sees her but does nothing. Why?

She was walking.

Posted in Brain Teasers

Exist Between Two Things

It can only exist between any two things
and men know it well for the hardships it brings.

Distance.

By Sef Daystrom

Posted in Riddles

Soft And Fragile Is My Skin

Soft and fragile is my skin
I get my growth in mud
I’m dangerous as much as pretty
For if not careful, I draw blood.

A thorn.

Posted in Riddles