One Hundred With Six Identical Digits

How can you express the number 100 using the same digit six times?

99 + 99/99 = 100

Posted in Brain Teasers

A Big Pizza Pie

To get the most pizza, should you order two 12″ pizzas or one 18″ pie?

One 18″, with ~255 sumptuous square inches. Two 12″ pizzas would only give you ~226 square inches.

Note: The area of a circle is = πr2.

Posted in Brain Teasers

The Old Gray Surgeon

A man and his son had a terrible car accident and were rushed to the hospital. The man died on the way, but the son was still barely alive. When they arrived, an old gray surgeon was called in to operate. Upon seeing the young boy, the surgeon said, “I can’t operate – this is my son.”

How is this possible?

The surgeon was the boy’s mother.

Posted in Brain Teasers

Three Letter Word Completion

What three letter word can complete the below words?

B___
D___
M___ET
P___ING
SH___

Ark, which produces: bark, dark, market, parking, shark.

Posted in Brain Teasers

Jump When I Walk

I jump when I walk, can’t go backward and sit when I stand. What am I?

A kangaroo.

Posted in Riddles
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Seen in the Water

I am seen in the water
If seen in the sky,
I am in the rainbow,
A jay’s feather,
And lapis lazuli.

Blue.

Posted in Riddles

Highest Product Using All Digits

What is the highest product that can be generated by multiplying two numbers while only using each digit once (1 through 9)?
For example, 12345678 * 9 = 111,111,102

9642 * 87531 = 843,973,902

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

I’m Yours, But Used More By Others

I belong to you, but am used more by others.

What am I?

Your name. It could also be your phone number.

Posted in Riddles

To Frighten a Thief

What four letters frighten a thief?

OICU (Oh I see you!)

Posted in Riddles