What has to be broken before you can use it?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

Who are the happiest people in IPL match?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

Find the missing number: 1, 2, 3, 10, 10, ?, 9,802

What does this mathematical rebus means ?

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4