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

Can you start the fire using two pieces of wood?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

John needs to purchase 100 chocolates from three different shops and he has exactly 100 rupees to do that which he must spend entirely. He must buy at least 1 Chocolate from each shop.

The first shop is selling each chocolate at 5 paise, the second is selling at 1 rupee and the third is selling at 5 rupees.

How many chocolates should he buy from each shop?

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

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

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

What am I?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?