How do you go from 98 to 720 using just one letter?

What is at the end of a rainbow?

What you cannot hold but it is yours?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

What has many keys but can’t open a single lock?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

Move four matchsticks to the below square to form three squares?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?