What is the longest word in the dictionary?

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 ?

Spot 5 differences in two Christmas tree below:

Solve the counting riddle by identifying the number of triangles in the given picture.

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

What is black when you buy it, red when you use it, and gray when you throw it away?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

what does the below rebus mean?