What is the coolest letter in the alphabet?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

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?

Can you find out which options fits best with the missing column?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

Replace the question mark with the number below given a simple math problem.

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?