I am quite hot but become too cold if you remove the first two letters. What am I?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

You walk into a creepy house by yourself. There is no electricity, plumbing, or ventilation. Inside you notice 3 doors with numbers on them. Once you open the doors you will die a particular way. Door No.1 You’ll be eaten by a lion who is hungry. Door No.2 You’ll be stabbed to death. Door No.3 There is an electric chair waiting for you. Which door do you pick?

Can you find the 09 errors in the picture below?

They are three errirs in this question. Can you find them?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

Count the number of triangles in the given picture.