What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

You visit a home for specially-abled children on the occasion of Christmas where you meet with 50 children. You have a box of chocolates containing 50 chocolates exactly.

What if you were asked to one chocolate to each child in a manner that one chocolate still remains in the box? Is it possible?

Solve this riddle by finding the odd one out from the rest.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

I am white when I am dirty, and black when I am clean. What am I?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your