Riddles and Brain Teasers

Which Door First?

While driving his car a man slams on the brakes when he sees, in the middle of the street, a diamond studded door, a gold door and a silver door. Which door does he open first?

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His car door

Posted in Brain Teasers

Only Useful When Full

I am only useful when I’m full,
Yet I am always full of holes.

What am I?

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A sieve, used for straining food like pasta.

Posted in Riddles

Hold In Your Left Hand

What can you hold in your left hand and not in your right?

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Your right elbow. You can try it yourself if you’re not convinced, but unless you have a broken arm or an incredibly flexible ulna, you won’t reach it.

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Give Me Drink and I Die

Feed me and I live, give me drink and I die. What am I?

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Fire.

Posted in Riddles

Amber Knits and Fauna Worry

Find a single letter that replaces the first letter in the two words of each row to make two new words. What word is formed by combining the new letter of each row?

For example: PLANK _ BRISK

The new letter is F, making FLANK and FRISK. And F would be the first letter of the answer.

AMBER _ KNITS
FAUNA _ WORRY
WARNS _ AERIE
FEMUR _ GAILY

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1. U – UMBER and UNITS
2. S – SAUNA and SORRY
3. E – EARNS and EERIE
4. D – DEMUR and DAILY

The new word is USED.

Posted in Brain Teasers

Messy Math

What is the answer to this problem?

48 / 2(9 + 3) = ?

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It depends. Usually, math has one right answer, but in this case, the order of operations can get a little quirky.There are two ways to solve this. First, like so:
48 / 2 × (9 + 3) = ?
48 / 2 × (12) = ?
24 × 12 = 288But another, arguably valid way is:
48 / 2 × (9 + 3) = ?
48 / 2 × (12) = ?
48 / 24 = 2Thanks to KnowYourMeme for providing a great overview on this one. Math StackExchange has more discussion.

It depends. Usually, math has one right answer, but in this case, the order of operations can get a little quirky.

There are two ways to solve this. First, like so:
48 / 2 × (9 + 3) = ?
48 / 2 × (12) = ?
24 × 12 = 288

But another, arguably valid way is:
48 / 2 × (9 + 3) = ?
48 / 2 × (12) = ?
48 / 24 = 2

Thanks to KnowYourMeme for providing a great overview on this one. Math StackExchange has more discussion.

Posted in Brain Teasers

What I Embrace I Destroy

My first two letters say my name.
My last letter asks a question.
What I embrace I destroy.

What am I?

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Ivy. IV is pronounced ivy, y is pronounced why and fast growing ivy can smother and kill trees, shrubs and grass.

Posted in Riddles

Tagged with What am I?

Far Blow Bacon

What do the following words have in common?

far
blow
bacon
lather
fasting
wariness
pacemaker

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Each of these words becomes a new word when the letter ‘e’ is placed after the first letter.far = fear
blow = below
bacon = beacon
lather = leather
fasting = feasting
wariness = weariness
pacemaker = peacemaker

Each of these words becomes a new word when the letter ‘e’ is placed after the first letter.

far = fear
blow = below
bacon = beacon
lather = leather
fasting = feasting
wariness = weariness
pacemaker = peacemaker

Posted in Brain Teasers

A Black Dog Night

A completely black dog was strolling down main street during a total blackout affecting the entire town. Not a single streetlight had been on for hours. As the dog crosses the center of the road a Buick Skylark with two broken headlights speeds towards it, but manages to swerve out of the way just in time. How could the driver see the dog to swerve in time?

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It was during the day.

Posted in Brain Teasers