Riddles and Brain Teasers

Asks No Questions

What asks no questions but receives lots of answers?

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A phone or doorbell.

Posted in Riddles

One Two Six Sequence

What is the next number in this series?

1, 2, 6, 42, 1806, ___

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To get the next number, multiply the previous number in the series by itself plus one:n × (n + 1).For example, to get 6, multiply 2 × (2 + 1)
To get 42 multiply 6 × (6 + 1)Thus, 1806 × 1807 = 3263442

To get the next number, multiply the previous number in the series by itself plus one:

n × (n + 1).

For example, to get 6, multiply 2 × (2 + 1)
To get 42 multiply 6 × (6 + 1)

Thus, 1806 × 1807 = 3263442

Posted in Brain Teasers

Tagged with sequence

Your Mother’s Brother’s Brother-In-Law

I am your mother’s brother’s only brother-in-law. Who am I?

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I am your father. L-u-u-u-u-u-u-ke!

Posted in Brain Teasers

The Most Impressive Boundary

The most impressive boundary’s not a wall.
It’s not a manufactured thing at all.
Moving towards it won’t reduce the gap
and nothing marks its presence on a map.

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The horizon.

By Sef Daystrom

Posted in Riddles

B C D

B, C, D, E, G, P

What is the next letter in the sequence?

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T. All of the letters rhyme.

Posted in Brain Teasers

Measured But Not Seen

What can be measured but not seen?

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Time. Or my toes when I’ve had one too many donuts…

Posted in Riddles

Have No Face

I turn my head and you may go where you want.
I turn it again, you will stay till you rot.
I have no face, but I live or die,
By my crooked teeth.

What am I?

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A key

Posted in Riddles

Probability That Both Children Are Girls

Walking down the street one day, I met a woman strolling with her daughter. “What a lovely child,” I remarked. “In fact, I have a younger child as well,” she replied.

What is the probability that both of her children are girls?

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1/2 probability. This has been know to cause raging debates and is known as one of the variations of the Boy or Girl paradox. This variation is more straightforward because knowing the position of the child leaves only two possibilities – the other child is a boy or a girl, each of which have a 1/2 probability.Another variation of this can be found here.

Another variation of this can be found here.

Posted in Brain Teasers

Numbers Map

Arrange the numbers from 1 to 8 in the following sequence.

     a
  b  c  d
  e  f  g
     h

Each number must not be diagonally or directly adjacent to any number directly before or after it.

For example, 2 can only be placed in one spot.

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Here are two solutions (there might be more).

Posted in Brain Teasers

To Be Gold Is Good

To be gold is to be good,
To be stone is to be nothing,
To be glass is to be fragile,
To be cold is to be cruel.

What am I?

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A heart.

Posted in Riddles

Tagged with What am I?

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