Name a key which is hardest to turn.

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

How can one talk without saying a single word?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

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

What can you deduce from the following BrainBat?

CRY
LMKI

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?