Horse Fence

Farmer Finnegan needs to build a fence to keep his horses on his property. He only has a little over 1.5 miles of fence materials, but there’s also a mile-long straight river running through his property. What shape should he use for the fenced in area to give his horses the most space possible?

Our dear friend Finnegan should build a half-circle fence with the river as the diameter, giving the horses about 0.4 square miles to frolic and play in.

Area of semi-circle = πr2 / 2 = π × .5 miles2 / 2 = 0.3927

Posted in Brain Teasers

Two Faces But Show You One

I have two faces, but show you one.
I once had guests, but now have none.
I’m rarely bloody and seldom blue.
I’m often promised and sometimes new.

The moon. It has two sides, but on earth we only ever see one side. Man has been on the moon, but no one is there now. A full lunar eclipse is known as a blood moon, and the phrase “once in a blue moon” refers to something that rarely happens. Promising the moon is making an extravagant or impossible promise, and there’s a new moon once every lunar cycle.

Posted in Riddles
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I’m Told and Make You Crazy

I can be told and can make you crazy,
Most people don’t like me and think I’m harmful.

What am I?

A lie. Lies are told, can make people crazy with rage, and most people don’t like to have lies told to them. Lies can’t be harmful though. :) (See what I did there?)

Posted in Riddles

One Six Seven Nine to Twenty Four

Given the numbers 1, 6, 7 and 9, find an equation that equals 24. You may only use each digit once.

91 – 67 = 24 or
(9 – 6) x (7 + 1) = 3 x 8 = 24 or
6 x √9 + 7 – 1 = 18 + 6 = 24

Posted in Brain Teasers

Its Own Past Tense

What common verb becomes its own past tense by rearranging its letters?

Eat (ate).

Posted in Riddles

Loses Its Head Every Morning

What loses its head every morning only to get it back every night?

A pillow.

Posted in Riddles

Sweet And Valuable, But Lightning Fast

A tiny thing, that you exist,
Sweet and valuable, but lightning fast,
Combined minds and a member of royalty,
Without me you would die.

What am I?

The letter ‘b’, the verb to be or a bee. The letter b and a bee are both small and to be means you exist. Bees make honey, which is sweet, and their wings are going at around 230 beats per second. Bees are valuable because they pollinate flowers. They live in hives and the queen bee runs the show. If it weren’t for bees, we would probably starve to death.

Posted in Riddles

Marcus’ Strange Age

Marcus was 15 years old in 2010. In 2015 he was only 10 years old. How is this possible?

The years are B.C., so 2015 came before 2010.

Posted in Brain Teasers

Scrambled Auctioned

What are two other words (anagrams) that can be made from the letters in “auctioned”?

1. Cautioned
2. Education

Posted in Brain Teasers

Only Room You Can’t Enter or Leave

What’s the only room from which no one can enter or leave?

A mushroom.

A variation of this riddle is as follows.

I am a room with no doors and no windows, what am I?

Posted in Riddles