Twice in Eternity

I occur twice in eternity,
And I’m always within sight.

What am I?

The letter ‘t’.

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Rotating Coins Around Coins

You have two coins of equal size on a table, situated end to end vertically. If you roll the top coin around the bottom coin until it returns to its original position, how many times will it have rotated?

Twice. See this video for more details.

Posted in Brain Teasers

Turd Station

At Coney Island (the amusement park in Ohio) over Memorial Day weekend I saw a changing station in the men’s bathroom. A clever fellow had scraped off some letters to make the changing station read, “Turd Station”. What was the original name of the changing station?

sTURDy Station2, by Rubbermaid.

Here’s a picture of one without the letters scratched out.

rubbermaid-changing-station

Posted in Brain Teasers

Has Wings But Cannot Fly

What has wings but can not fly.
Is enclosed, but can outside also lie.
Can open itself up or close itself away.
Is the place of kings and queens,
And doggerel of every means.
What is it upon which I stand,
Which can lead us to different lands?

A stage.

Posted in Riddles

Walking Through Paper

You have a regular sized piece of paper. How could you cut a hole in it large enough for you to walk through?

Fold the paper in half and make cuts that are almost entirely across the width of the paper. Switch between sides. When the paper is opened there will be a very large hole that you can climb through (carefully).

Posted in Brain Teasers

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

Buying Chickens

You must buy 100 chickens for exactly $100, and purchase at least one chicken from each store. The first store charges 5 cents/chicken, the second charges $1/chicken and the third charges $5/chicken. How many chickens should you buy from each store?

80 from store 1 = $4
1 from store 2 = $1
19 from store 3 = $95

Posted in Brain Teasers

I Used to Be The Light of Your Life

I used to be the light of your life,
I’d keep you warm while I cried,
Now I’m forgotten and tossed away.

What am I?

A candle. They used to be a primary source of light, and to a lesser extent heat. The “crying” is the wax rolling down the candle.

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Painting a Bigger Room

A painter needed 3 days to paint a room. How long would it take him, working at the same rate, to paint a room twice as large (twice the width and twice the height)?

12 days because the walls would be four times as big as the first room.

If the walls are 10 ft x 10 ft, then each wall has 100 square feet. Adding the four walls makes 400 square feet to paint. Doubling the width and height of the walls to 20 ft x 20 ft means each wall is now 400 square feet, for a total of 1600 square feet to paint. 1600 ft is four times 400 square feet, thus if it took him 3 days to paint 400 square feet, it will take 12 days (or four times as much) to paint 1600 square feet.

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An Abandoned Aquarium

There is an abandoned aquarium in an empty house. The aquarium has three large fish and three small fish. But after a week, one large fish and two small fish die.

How many remain in the aquarium?

Six, since no one is there to remove the 3 dead fish.

Posted in Brain Teasers