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

Imprisoned In Wood and Never Released

I am taken from a mine and shut up in a wooden case from which I am never released. Yet I am used by almost everybody. What am I?

Pencil lead. While modern pencils don’t contain lead, that’s still what we call the graphite compound. When real lead was used in pencils it was mined and nearly everyone has used a pencil at some point in their life.

Posted in Riddles

Sounds Nothing Like the Word

When pronounced, it sounds nothing like the word.

A sentence.

By Sef Daystrom

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

Two Backbones

I have two backbones and thousands of ribs and I stretch across the land. What am I?

Train tracks.

Posted in Riddles
Tagged with

I Sleep By Day

I sleep by day, I fly by night. I have no feathers to aid my flight. What am I?

A bat.

Posted in Riddles
Tagged with

How Are These Countries Ordered?

How are these countries ordered?

1. Canada
2. Indonesia
3. Russia
4. Philippines
5. Japan
6. Australia
7. Norway
8. United States
9. New Zealand
10. China

By kilometers of coastline (according to the CIA World Factbook).

1. Canada – 202,080 km / 125,567 mi
2. Indonesia – 54,716 km / 33,998 mi
3. Russia – 37,653 km / 23,396 mi
4. Philippines – 36,289 km / 22548 mi
5. Japan – 29,751 km / 18,486 mi
6. Australia – 25,760 km / 16,006 mi
7. Norway – 25,148 km / 15,626 mi
8. United States – 19,924 km / 12,380 mi
9. New Zealand – 15,134 km / 9403 mi
10. China – 14,500 km / 9009 mi

Note: Greenland has 44,087 km of coastline but it is not yet a fully independent country.

Posted in Brain Teasers

Seemingly Simple Math

What is the answer to this math problem:

8 ÷ 2 (2 + 2)

16 or 1, depending.

According to PEMDAS, parentheses come first: 8 ÷ 2 (4)

Then, even though multiplication is first in PEMDAS, you go left to right: 4 (4) = 16

If you got 1, you’re in good company. That’s what I got at first too but most calculators I’ve tried get 16.

I found this at Popular Mechanics and the debate continues online.

Posted in Brain Teasers

Soldiers Line Up Spaced With Pride

Soldiers line up, spaced with pride,
Two long rows lined side by side,
One sole unit can decide,
If the rows will unite or divide.

What am I?

A zipper.

Posted in Riddles
Tagged with

What Begins and Has No End?

What begins and has no end? What is the ending of all that begins?

Death or decay.

Posted in Riddles