Can you replace the question mark with the correct number?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

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

What is the Surname of Barbie Doll?

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

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

Can you find the key in the picture below?

What goes through cities and fields, but never moves?

What is the word or phrase below?
R | E | A | D

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?