William is blindfolded and is playing archery. Unfortunately, when he shoots the first shot, he misses the bull’s eye. When he shoots the second shot, the arrow goes even farther and he misses it. William again shoots the third arrow. Question: how greater is the chance for making his last shot also worse than the previous and the first one?
Outside a room there are three light switches. One of switch is connected to a light bulb inside the room. Each of the three switches can be either ‘ON’ or ‘OFF’. You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once) Your task is to then determine which switch controls the bulb ??
Sasha is thinking about investing 20.000 dollars in a company, which offers him a five-year plan of divident payment at the end of each year: At the end of the first year, he will get 2000 dollars. At the end of the second year, he will get 4000 dollars. At the end of the third year, he will get 6000 dollars. At the end of the fourth year, he will get 6000 dollars again, and at the end of the last year of payment plan, he will get 5000 dollars. What is the maximum interest rate a bank could offer […]
Four friends built a colony for themselves. They built their own houses at different distances from each other. Chris lived 60 km away from Alex. Darren lived 40 km away from Bill. Chris lived 10 km nearer to Darren than he lived to Bill. Can you find out how far was Darren’s house from Alex?
A scientist gathered four math students. They were then lined up so that each one could see the one in front of them but not behind them. Each had a hat placed on their head. So the student in the back could see the hats of the three students in front, but the student in front could not see any hats. “There is a red hat, a white hat, a blue hat, and a hat that is a duplicate of one of those colors,” the scientist said. Starting with the one in the back, each student was asked what color […]