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Forum » Test category » Science club forum » Think of science......think of puzzles (Some more puzzles for you...)
Think of science......think of puzzles
scienceclubDate: Wednesday, 05-Nov-2014, 5:57 PM | Message # 1
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1. A bear walks south for one kilometer, then it walks west for one kilometer, then it walks north for one kilometer and     ends up at the same point from which it started. What color was the bear?

2. A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens     does the farmer need to produce one dozen eggs in six days?

3. A scientist is experimenting with bacteria that are one micron in diameter and that reproduce by dividing every minute     into two bacteria. At 12:00 PM, she puts a single organism in a container. At precisely 1:00 PM, the container is full.
    At what time was the container half full?

4. Three students checked into a hotel and paid the clerk $30 for a room ($10 each). When the hotel manager returned,     he noticed that the clerk had incorrectly charged $30 instead of $25 for the room. The manager told the clerk to     return $5 to the students. The clerk, knowing that the students would not be able to divide $5 evenly, decided to keep     $2 and to give them only $3.

    The students were very happy because they paid only $27 for the room ($9 each). However, if they paid $27 and the     clerk kept $2, that adds up to $29. What happened to the other Dollar?

5. Fiji (in Melanesia) and American Samoa (in Polynesia) are two islands in the South Pacific Ocean. Fiji is about 970     kilometers (600 miles) west of American Samoa. A small airplane can fly this distance in two hours.
    When will you arrive in Fiji if you leave American Samoa on a small airplane on Tuesday night at 11:30 PM?

6. You start walking north and you walk in a straight line for two kilometers. When you look at the map, you discover     that you actually walked one kilometer north and one kilometer south. How is this possible?

7. At a bar, there is a bucket containing ice, some of which has melted. A bartender gets an ice cube weighing 20 grams     from the ice bucket and puts it into an insulated cup containing 100 grams of water at 20 degrees Celsius. Will the ice     cube melt completely? What will be the final temperature of the water in the cup?

8. An astronaut orbiting in a space capsule at normal atmospheric pressure ejects 100 grams of water into the vacuum     of space. How much water will turn into ice?

9. My sister has six red stamps and three blue ones. In her collection, seven stamps are from Mexico and six stamps are     from France. One stamp is purple and it is not from Mexico or France. Two of her Mexican stamps are red and one is     blue. Two of her French stamps are blue and three are red. How many stamps does she have?

10. At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the       party?
 
scienceclubDate: Wednesday, 05-Nov-2014, 5:59 PM | Message # 2
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11. All students in the physics class also study mathematics. Half of those who study literature also study mathematics. Half of the students in the mathematics class study physics. Thirty students study literature and twenty study physics. Nobody who studies literature studies physics. How many students in the mathematics class study neither physics nor literature?

12. You have been promoted to pet detective while Ace Ventura guides some tourists on a safari. From the following clues, you must figure out who is the owner of each pet, and where the pet got lost.
  • A rabbit and a dog are two of the lost pets.
  • The pet lost in the garden is owned by Mary.
  • Robert does not own a dog.
  • John's pet was lost in the woods.
  • The cat was not lost in the woods or in the park.

    13. An investor trading through a discount stock broker that charges $10.00 Dollars per transaction bought 200 shares of Vola Tile Corporation at $50.00 Dollars per share. The stock quickly increased in value by 50%, but then lost 40% of its value. The investor sold the stock. How much money did the investor gain or lose?

    14. The path to enlightenment lies behind one of two doors. In front of each door stands a guard who knows which door leads to enlightenment, but one of the guards always lies and the other one always tells the truth. In your search for enlightenment, you are allowed to ask one guard only one question that can be answered "yes" or "no", but unfortunately, you do not know which guard is the liar. You will be banished to the dungeon of logical illiteracy if you fail in your quest. What question should you ask to find the path to enlightenment?

    15. An electrician has two two-way switches (single-pole, double-throw), a light bulb, and a power source. How should he connect the terminals so that either switch can be used to turn the light on or off?
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