How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

If you say my name, I will no longer exist. What am I?

You need to remove two matchsticks to make the below equation true. Can you do it ?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.