Three closed boxes have either white marbles, black marbles or both, and they are labeled white, black and both. However, all three boxes are mislabeled. You may reach into one of the boxes and pull out only one marble.
Which box should you remove a marble from to determine the contents of all three boxes? Riddle Answer
In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake? Riddle Answer
There is a table on which 20 coins are placed. You also know that there are 10 coins with heads up, and 10 coins with tails up. You are blind folded and there is no way to determine which side is up by rubbing, etc.
Your task is to create two groups of coins, each having the same number of heads and tails. You may only move or flip coins. How can you accomplish this while being blindfolded? Riddle Answer
If a doctor gives you three pills, telling you to take one every half hour, how many minutes will pass from taking the first pill to the last pill? Riddle Answer
An old auto is to drive a stretch of 2 miles, up and down a hill. Because the auto is so old, you cannot drive the first mile (the ascent) faster than 15 miles per hour.
How fast do you have to drive the second mile (going down the hill) in order to get an average speed of 30 miles per hour? Riddle Answer