What runs around the whole yard without moving?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. 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. Can you tell me how that was possible?”

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

I always drive my customer away.

Who am I?

Solve the alphametic puzzle by replacing the alphabet with the number.

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