How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Count the squares in the matchstick puzzle below?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

what does the below math rebus puzzle mean?

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?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

If eleven plus two equals one, what does nine plus five equal?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?