Many and One

We are many and one,
We wave and we drum,
We will cover a stare,
With you everywhere.

What are we?

Hands.

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What Can You Add to One To Make It Go Away?

What can you add to one to make it go away?

The letter g. Then it’s gone.

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Toss Me Out the Window

Toss me out of the window,
You’ll find a grieving wife,
Pull me back but through the door, and
Watch someone give life!

What am I?

The letter “n”. (widow, donor).

Posted in Riddles

Which Switch?

You are standing outside a closed door. On the other side of the door is a room that has three light bulbs in it. The room is completely sealed off from the outside. It has no windows and nothing can get in or out except through the door. On the outside of the room there are three light switches that control each of the respective light bulbs on the other side of the door.

Your assignment is to determine which light switch controls which light bulb. You are allowed to enter the room only once, and once you come out, you must be able to state with 100% certainty which light switch controls which light bulb.

Turn one light switch on, wait a few minutes, then turn it off and turn another light switch on. Go into the room and feel the light bulbs. The one that’s still warm is connected to the switch that you first turned on, the one that is on was the second switch you turned on, and the last bulb is controlled by the switch that you didn’t touch.

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Letter Missing From a Series

What letter is missing from this series?
B C D G P T V Z

The letter E. The series contains all of the letters that rhyme with bee (apologies to any English speakers who pronounce Z as zed instead of zee if this confused you).

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Bed, Evil, Identical

What word can be added before or after these words to make a new word or phrase?

Bed, Evil, Identical

Twin. Twin bed, Evil twin, Identical twin.

Posted in Riddles

Thought Rebus

What does this represent?

          but
thought thought

But on second thought.

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Five Three Two

What is the answer to the last equation?

5 3 2 = 151012
9 2 4 = 183662
8 6 3 = 482466
5 4 5 = 202504
7 2 5 = ?

10000 × (x × y) + 100 × (x × z) + transpose_digits(x × y + y × z)

transpose_digits() just swaps the digits

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A Gentle Touch

What force and strength cannot get through,
I, with a gentle touch, can do.
And many in the street would stand,
were I not a friend at hand.

A key.

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No New Digits

A six-digit number represented by ABCDEF (each letter represents a different number) can be multiplied by 2, 3, 4, 5, and 6 and yet no new digits appear in the result. As a matter of fact, all the digits are rotated. What is the number?

142857 (The first 6 digits of 1/7)

2 x 142857 = 285714
3 x 142857 = 428571
4 x 142857 = 571428
5 x 142857 = 714285
6 x 142857 = 857142

Posted in Brain Teasers