Find the number of squares in the below picture

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What has a ring but no finger?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

I am sure no one can have two things for dinner. what are they?

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

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?