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 ?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What has a ring but no finger?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

Find the next number in the series below

21 32 54 87 131 ?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?