You begin reading a book that is three hundred pages long. If you read half of the remaining book each day, how long would it take you to finish it?
Riddle AnswerLogic Riddles
Five Pieces of Chain
A man has 5 pieces of chain that must be joined into a long chain. He can open ring 3 (first operation), link it to ring 4 (second operation), then unfasten ring 6 and link it to ring 7, and so on.
He could complete his task in 8 operations, but he wants to do it in 6. How does he do it?
Riddle AnswerSwitching Problem
Here is a light switch. Note the order of the positions. If the light is now at medium and it is switched 3922 times what will be the position of the switch?
Cookie Problem
In a cookie jar, there are ten butter cookies and ten chocolate-chip cookies. Tom sneaks over to the cookie jar in the middle of the night and tries to figure out:
- How many cookies do I need to take out of the jar if I want to make sure to get at least two of each kind?
- How many cookies do I need to take out of the jar if I want to make sure to get at least two butter cookies?
Romantic Candlelight Dinner
A man lights two candles and begins a romantic candlelight dinner with his wife. The candles are of equal length, but one candle is thicker than the other.
The thick candle is designed to last for 6 hours while the thin candle is designed to last for 3 hours.
At the end of the dinner, the thick candle is twice as long as the thin candle. How long did the dinner last?
Riddle Answer