Count the number of balls in picture below:

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?

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

What is black when you buy it, red when you use it, and gray when you throw it away?

What number should come in place of the question mark below?

What's a single-digit number with no value?

Which is faster, Heat or Cold ? Explain.

Three friends named Mr. Black, Mr. Yellow and Mr. Green enter a pub on a weekend night. They are wearing either a Black, Yellow or Green shirt.

Mr. Yellow says to them, 'Did you notice that we all are wearing different color shirts than our names?'

To this, the man who was wearing the Green shirt said. 'Wow, thats right.'

Can you identify who is wearing which colour shirt ?

Why Aeroplane windows are round?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?