2, 3, 6

What number comes next in this series?

2 3 6 7 1 9 4 5 ___

8. The numbers are in reverse alphabetical order.

Two, three, six, seven, one, nine, four, five, eight.

Posted in Brain Teasers

A Cloth Poorly Dyed

A cloth poorly dyed
And an early morning sky
How are they the same?

Their color both change easily.

Posted in Riddles

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.

Posted in Brain Teasers

Here Comes My Wife and Daughter

Two men are standing on one side of a bridge and two women are approaching them. One of the men says, “Here comes my wife and daughter” to which the second man replies, “Here comes my wife and daughter”. If they have not married the same woman and the women aren’t pregnant, how is this true?

The men are widowers and married each others’ daughter.

Posted in Brain Teasers

I Start Out The Same As Others

I start out the same as others,
Then grow to four legs and four arms,
And two hearts beat inside,
Until the separation.

What am I?

A pregnant woman is like other women, then the baby forms, and then is delivered.

Posted in Riddles
Tagged with

I Move Quickly

Physicists have built devices to make me move quickly. My last eight letters can be commonly found in newspapers, magazines, and journals.

What am I?

Particles. Physicists use particle accelerators and newspapers, magazines and journals have articles.

Posted in Riddles
Tagged with

AADFJJ

A A D F J J J M M N ?

What comes next in the series?

O S. The series contains the first letter of each month in alphabetical order (April, August, December, February, January, July, June, March, May, November). O and S represent the remaining 2 months, October and September.

Posted in Brain Teasers
Tagged with

Wake Up With No Electricity

I can wake you in the morning but I require no electricity or winding.
I can also provide you with a meal, but only once.

What am I?

A rooster. If you did use electricity on your rooster, you would no longer be woken up, but it could provide a finger lickin’ last meal.

Posted in Riddles
Tagged with

Sentca

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

S E N T C A

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

Posted in Brain Teasers

Represent The Alphabet

What word or expression does this represent?

ABCDEFGHIJKLMNOPQRSTVWXYZ

Missing you (U).

Posted in Brain Teasers