Can you count the number of triangles in the given figure?

Solve the mathematical equation in the picture below.

I don't get anymore wetter, no matter how much rain falls on me.

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

You need to move three matchsticks to form three squares. Can you do it?

Can you identify the hidden rebus in the image below?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?