Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

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

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

What goes up but never comes down?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?