Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

What does below Rebus say?

XLR8

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What is the riddle which can be asked all day with a different correct answer each time.

What is harder to catch the faster you run?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

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

What is the difference between a jeweller and a jailer?