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 ?

Before Mount Everest was discovered, what was the highest mountain in the world?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

Can you find the key in the picture below?

Can you divide the below-given shape into four equal and identical pieces?

Can it be possible to build a house that has all its four walls facing towards the South?

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

When did John make this statement?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Until it is measured, not known. Yet how you miss it when it has gone. What is it?