Riddles and Brain Teasers

One Two Six Sequence

What is the next number in this series?

1, 2, 6, 42, 1806, ___

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

I’m Located In the Middle of Nowhere

I am located in the middle of nowhere. What am I?

Show the answer »

The letter ‘h’. It is the middle letter of the word ‘nowhere’

Posted in Riddles

Midway Numbers

Select the number that is midway between the lowest number and the highest number.
Which number is midway between that number and the number that is nearest the highest number?

35  5 52 36 67
69  4 51 37 71
55 68  3 53 39

Show the answer »

53.

37 is midway between 3 (the lowest number) and 71 (the highest number).
53 is midway between 37 and 69 (nearest to the highest number).

Posted in Brain Teasers

A Slight Inclination of the Cranium

A slight inclination of the cranium is as adequate as a spasmodic movement of one optic to an equine quadruped utterly devoid of any visionary capacity.

Translate this rather strange sentence into one that is more sensible.

Show the answer »

A nod is as good as a wink to a blind horse.

Posted in Brain Teasers

Messy Math

What is the answer to this problem?

48 / 2(9 + 3) = ?

Show the answer »

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

Sentca

Four words can be made from the letters below. What are the words?

S E N T C A

Show the answer »

1. ENACTS
2. ASCENT
3. STANCE
4. SECANT

Posted in Brain Teasers

Fourth of July in England

Is there a 4th of July in England?

Show the answer »

Yes, there’s a 4th of July in every country. Of course they don’t treat it as a holiday as citizens of the United States do, but that’s not what was asked.

Posted in Brain Teasers