By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)