Lets play a guessing game. Have selected a number in my mind and you have to find it out. The hint for you is: The tens digit is 7 more than ones digit and the hundreds digit is 6 less than the tens digit.
Can you find the number now?
Three possible answers (when restricting number to 3 digits): 170, 281, 392. So the answer is NO.
Let's play a game. If I went halfway to a town 60 km away at the speed of 30 km/hour, how fast do I have to go the rest of the way to have an average speed of 60 km/hour over the entire trip?
I have one of the three numbers: 1, 2, or 3 in my mind. I speak only the truth. You can ask me just one question for which I will only reply in yes or no or don’t know. What question will you ask me so that you are able to know the number?
You and a friend play a game where you start with a pile of 1000 stones, and each turn you can either add 2 stones to the pile or remove 10 stones.
The player to remove the last stone wins.
Should you start first or second to win this game?
