I have eight fingers and two thumbs but I do not live. What Am I?

81 x 9 = 801. What must you do to make the this equation true?

Count the Triangle in the figure given below:

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?

I look at you, you look at me, I raise my right, you raise your left. What am I?

What does the below mathematical rebus mean?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?