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

What is the last thing you take off before bed?

John is found dead in his office at his desk. The police have narrowed the suspects down to three people: Mrs. Jacob, John’s wife Hena and his business partner Jason . All three visited John on the day of his murder, but all three provide the police with stories of explanation as to the reason for their visit.
Police found John with his wrist watch still on his right arm, a torn up picture of his wife laying on the floor beside the trash can, and an ink pen in his right hand. On the desk, the police found a name plate, a telephone that was off the hook, and a personal calendar turned to the July 5th page with 7B91011 written on it. After examining this evidence, the police knew their suspect. Who was it ?

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

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

There is a place where if I stand up straight, I will still be considered sideways.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Why do you find that most of the buildings are deprived of the 13th floor?