There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

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

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

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 ?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?