2009
12.18

Brain Teasers

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1. Jim wrote all the numbers from 300 to 400 on a piece of paper. How many times did he write the digit 3?

Jim wrote one hundred and twenty 3’s! He wrote one hundred 3’s in the hundreds places, ten 3’s in the tens places, and ten 3’s in the ones places.

2. I am eight letters long – “12345678″
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is to appropriate.
My 45 is a friendly thank-you.
My 678 is a name.
Q: What word am I?

M I S T A K E N

3. What is the easiest way to throw a ball, and have it stop, and completely reverse direction after traveling a short distance?

Throw the ball Straight up.

4. How would you rearrange the letters in the words “new door” to make one word? Note: There is only one correct answer.

One Word!

5. What is at the beginning of eternity, the end of time, the beginning of every end, and the end of every place?

“e”

6. A traveler comes to a fork in the road and does not know how to get to his destination. Two men are at the fork in the road. One of them always tells the truth, and the other one always lies. He may ask the men on question to find his way. What question does the man ask these men?

He asks them, “If I ask the other man which way to go, what would his answer be?” They would both answer in the same way. Whatever the answer is, go the other way. If the man you ask always tells the truth, then the other always lies. The man you ask will tell truthfully that the answer would be the wrong way. If the man you ask always lies, then the other man tells the truth. The man you ask will lie and tell you that the other man would tell you the wrong way. In both cases the answer you would receive would be the wrong way. Go the other way.

7. A boy leaves his house one summer day, and began to run through the woods to his best friend’s house which is on the other side of the woods. It should also be known that the boy reached his friend’s house. How far did the boy run into to woods?

Halfway. Because once you reach the middle, you are then running out of the woods.

8. Two girls on bicycles, 20 miles apart, began racing toward each other. The instant they started, a bee on the handle bar of one of the bikes started flying toward the other bike’s handle bar. As soon as it reached, it turned around and went to the other bike and so on until the bikes met. If each bike had a constant speed of 10 mph, and the bee was traveling 15 mph constantly, how far did the bee travel?

Each bike travels at 10 mph, so they meet at the center of the 20 mile distance in exactly 1 hour the fly travels 15 mph and so at the end of the hour, he will have gone 15 miles.

9. I dig out tiny caves, and store gold and sliver in them. I also build bridges to sliver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help yet many people are afraid to let me help them. What am I?

Dentist

10. A steer weighing 630 kilograms requires 13,500 calories a day to maintain its weight. That amount of food turns out to be proportional to its external surface. How many calories does a steer of 420 kilograms require?

Weight is proportional to linear dimension (length or girth of the steer) cubed. Surface area is proportional to linear dimension squared. Therefore, 13,500 x [ ( 420/630)1/3 ] 2 = 10,300 calories

11. A man rode into town on Friday. He stayed for three nights and then left on Friday. How come?

The man’s horse was called Friday.

12. Five pieces of coal, a carrot and a scarf are lying on the lawn. Nobody put them on the lawn but there is a perfectly logical reason why they should be there. What is it?

They were used by children who made a snowman. The snow has now melted.

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