An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

Which flower has two lips?

You can see three almost identical images below. Can you spot the odd one out from them?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I know a nine-letter word having only one vowel.
Do you ?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744