I have branches, but no fruit, trunk or leaves. What am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Count the Triangle in the figure given below:

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

The more it dries, the wetter it becomes. Can you tell what it is?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?