What is the word or phrase?

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 ?

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

what's the probability of getting a king or a queen from a pack of 52 cards?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Which tank will fill first?

Find the smallest sentence with all the English alphabet.