Riddles and 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

You Melted My Ice

A full glass of water with a single ice cube sits on a table. When the ice has completely melted, will the level of the water have increased, decreased or remain unchanged?

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The water level remains unchanged because the ice cube displaces its own weight. If you’re not convinced, read Archimedes’ Principle, which states that any floating object displaces its own weight of fluid. Still not convinced? Here are a few more sources.

Posted in Brain Teasers

Commonly Forgotten And Sometimes Rotten

I am always with you
But commonly forgotten.
You use me constantly,
And can sometimes be rotten.

What am I?

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Air.

Posted in Riddles

Where do the Numbers Belong?

Three numbers, 16, 14 and 38, need to be assigned to one of the rows of numbers below. Where do the numbers belong?

A	0	6	8	9	3
B	15	27	21	10	19
C	7	1	47	11	17

Hint: This is not a mathematical problem. The numerical values are irrelevant.

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The rows indicate the shape of the number. Row A is rounded, B is mixed and C is linear. Thus, 16 belongs in row B, 14 in row C and 38 in row A.

Posted in Brain Teasers

What Three Digit Number

What 3 digit number has a tens digit that is 5 more than the ones digit and a hundreds digit that is 8 less than the tens digit?

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194

Posted in Brain Teasers

Always Done On Purpose

Of all the things that are broken,
this makes the least noise
and is always done on purpose.

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Bread.

By Sef Daystrom

Posted in Riddles

Life Measured in Hours

My life can be measured in hours,
I serve by being devoured.
Thin, I am quick
Fat, I am slow
Wind is my foe.

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A candle.

Posted in Riddles

A Sunday Morning Murder

A man was killed on Sunday morning. His wife found the body and called the police. The police arrived and questioned the chef, maid, butler, and gardener. Their alibis were:

Chef – making breakfast
Maid – getting mail
Butler – setting table
Gardener – watering plants

The police immediately arrested the criminal. Who was it and how did they know?

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The maid. Mail isn’t delivered on Sunday.

Posted in Brain Teasers

Kevlar, Fire Escapes and Wipers, Oh My!

What do computer compilers, kevlar, fire escapes and windshield wipers all have in common?

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They were all invented by women.A variation of this brain teaser includes laser printers (they were invented by Gary Starkweather) and bulletproof vests (invented by Casimir Zeglen using silk, though modern vests use Kevlar, so it’s halfway right).

They were all invented by women.

A variation of this brain teaser includes laser printers (they were invented by Gary Starkweather) and bulletproof vests (invented by Casimir Zeglen using silk, though modern vests use Kevlar, so it’s halfway right).

Posted in Brain Teasers

That That Is Is

Add punctuation to these words to make a grammatically correct series of phrases.

That that is is that that is not is not is not that it it is

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That that is, is; that that is not, is not. Is not that it? It is.There are almost assuredly other grammatically correct variations. Feel free to add ones you can think of in the comments.

That that is, is; that that is not, is not. Is not that it? It is.

There are almost assuredly other grammatically correct variations. Feel free to add ones you can think of in the comments.

Posted in Brain Teasers

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