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

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

Can you move 2 matchsticks to form four equal sized squares.

Which Travels Faster? Solve below famous picture riddle:

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

Why is it very easy to weigh a fish?

Why is 6 afraid of 7?