What is the longest word in the dictionary?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

No matter how little or how much you use me, you change me every month. What am I?

You need to move three matchsticks to form three squares. Can you do it?

Replace the question mark with the correct number in below Picture:

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

What does below pictogram mean?