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

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

You can hear me, but you can't touch or see me.

What am I?

Can you find the 09 errors in the picture below?

Can you find the dog hidden in a group of pandas?

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

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

If 21x = 79x, what is the value of x?

Find the next number in the sequence

5 12 24 36 ?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?