Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

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?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What word is represented by this rebus?

How many triangles are there on the puzzle below?

why number 8549176320 is one of a kind?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Can you solve this picture maths equation?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?