Can you find out the total number of triangles in the given figure?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

A man plots the murder of his wife. His plan is full proof. Nobody saw them leaving their house. He stabbed her with a knife while driving. She died on the spot. He threw her body in a valley. He threw the knife carefully wiping his finger prints on a random garbage bin. Then he went back to his home and no one was watching him this time as well.

After an hour, he was called by the local police department who informed him that his wife was murdered. They asked him to reach the scene of crime immediately. But as soon as he arrived at the crime scene, he was arrested by them.

How did the police know that he himself is the murderer?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

How can one talk without saying a single word?

When it is alive we sing, when it is dead we clap our hands. What is it?

No matter how little or how much you use me, you change me every month. What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?