1 2 3 4 5 6 7 8 9 = 100

This equation is incomplete: 1 2 3 4 5 6 7 8 9 = 100

One way to make it accurate is by adding seven plus and minus signs, like so.

1 + 2 + 3 – 4 + 5 + 6 + 78 + 9 = 100

How can you do it using only 3 plus or minus signs?

123 – 45 – 67 + 89 = 100

Posted in Brain Teasers

The 22nd and 24th Presidents of the U.S.

The 22nd and 24th presidents of the United States of America had the same parents, but were not brothers. How is this possible?

It was the same guy! Grover Cleveland is the only president in history to serve two, non-consecutive terms.

Posted in Brain Teasers

One Strand Dangles

One strand dangles.
Two strands twist.
Three or more can
fashion this.

Braids

By Sef Daystrom

Posted in Riddles

Employ Rebus

What does this represent?

EMPLOY_ _ _ T

Men out of work.

Posted in Riddles
Tagged with

What’s Special About 854,917,632?

What is special about the number 854,917,632?

It is the numbers from one to nine in alphabetical order.

Eight, Five, Four, Nine, One, Seven, Six, Three and Two.

Posted in Brain Teasers

One Tooth To Bite

One tooth to bite,
He’s the forest’s foe.
One tooth to fight,
As all Norse know.

What is it?

An axe.

Posted in Riddles

Days of Summer

My days are in the summer
When you’ll eat me when I’m hot
In fact I’ll even eat myself
Where battles tough are fought
But when you find me in a fight
‘Twill be high in the sky
And if you catch me napping
I suggest you let me lie
When you’re bad come to my house
From Ma get thoughts profound
Am I big or am I small?
Some say I’m just a pound.

Dog. Dog days, hot dog, dog pound, dog fight.

Posted in Riddles

Hear a Lot, Say a Lot

I hear a lot
And I say a lot
Few ever look for me
And even fewer ever hear me
I hide in plain sight
Whether its day or night
To help is all I want
But most like to bend me
And as if they had a wand
Never again shall anyone find me
They do this to control
Without realizing the high price of a soul
But when I’m least expected
They’d rather be protected
For there shall be no place to hide
What am I?

The truth.

Posted in Riddles
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From There to Here

I can travel from there to here by disappearing, and here to there by reappearing.

What am I?

The letter “t”.

Posted in Riddles
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Messy Math

What is the answer to this problem?

48 / 2(9 + 3) = ?

It depends. Usually, math has one right answer, but in this case, the order of operations can get a little quirky.

There are two ways to solve this. First, like so:
48 / 2 × (9 + 3) = ?
48 / 2 × (12) = ?
24 × 12 = 288

But another, arguably valid way is:
48 / 2 × (9 + 3) = ?
48 / 2 × (12) = ?
48 / 24 = 2

Thanks to KnowYourMeme for providing a great overview on this one. Math StackExchange has more discussion.

Posted in Brain Teasers