I Widen My Jaws

I flex my jaws when you use me,
My only purpose is to damage,
Yet I’m used by small children.

What am I?

Scissors.

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Only Hides in the Unwound

What can be seen but never found that only hides in the unwound?

Relaxation. You can see when someone is relaxing, but no one can remain completely relaxed forever. You can relax more easily as you learn to unwind.

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False Positive HIV Test

Imagine an HIV test that is 95% accurate (false positive rate of 5%) and around 2% of the tested population is infected with HIV. What is the probability that you actually have HIV when your test comes back positive?

29%

To read more about this, see the False Positive Paradox page on Wikipedia.

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Three Foot Ruler

Where can you find a three foot ruler?

At a yard sale. How did another joke riddle get in here?

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Born In the Ocean

Born in the ocean,
White as snow,
I’m hidden in water,
Where do I go?

What am I?

Salt. Salt is harvested from seawater, it’s white and it dissolves in water.

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Fewest Queens For Full Attack

What is the smallest number of queens required on a chess board to attack all squares?

5. To see where they need to be placed, check out the diagram on Wolfram’s Queens Problem page.

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A Word of Weather

Find this eight-letter word.

The first four letters are a variation of the weather.
The third through seventh letters give support but also could used when someone is executed.
And the last three letters forms the name of a person.

What’s the word?

Mistaken.

Mist = Variation of weather.
Stake = a tent stake or when someone is burned at the stake.
Ken = a person’s name.

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I Drive Men Mad

I drive men mad
For love of me,
Easily beaten,
Never free.

Gold.

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All Words From Nine Letters to One

What 9-letter word can have a letter removed to make a new word and repeat the process until a single letter remains?

startling
starting
staring
string
sting
sing
sin
in
i

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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.

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