How many words can a pen with half refill write?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Can you start the fire using two pieces of wood?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

I am the fastest animal but cannot climb the tree. What am I?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Which wheel of car does not rotate when you turn your car right?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?