Which word does the below Plexor means ?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Which is faster, Heat or Cold ? Explain.

There is a place where if I stand up straight, I will still be considered sideways.

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

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

As shown in the picture below, we can see a boy hanging on the tree branch to save his life. There are various ways in which he can die like1. A snake hanging toward the right waiting to bite the boy.2. A roaring Lion near the tree.3. Two crocodiles are ready to attack if the boy reaches near water. The tree is chopped to some extent, so can fall as if he moves a lot. Can you give this boy an escape plan?

Using Only Five 5's and any mathematical operator make sum as 37