Friday, March 7, 2008

A Time Puzzle

Hey!

THE PROBLEM:
How many minutes is it until six o'clock if fifty minutes ago it was four times as many minutes past three o'clock?

The right answer you can find in comments.

Monday, February 25, 2008

Some Math Jokes

Hi!

1.
"My life is all arithmetic", the young businesswoman explains. "I try to add to my income, subtract from my weight, divide my time, and avoid multiplying..."

2.
In a dark, narrow alley, a function and a differential operator meet:
"Get out of my way - or I'll differentiate you till you're zero!"
"Try it - I'm ex..."

3.
Math problems? Call 1-800-[(10x)(13i)2]-[sin(xy)/2.362x].

4.
"What is Pi?"
A mathematician: "Pi is the ratio of the circumference of a circle to its diameter."
A computer programmer: "Pi is 3.141592653589 in double precision."
A physicist: "Pi is 3.14159 plus or minus 0.000005."
An engineer: "Pi is about 22/7."
A nutritionist: "Pie is a healthy and delicious dessert!"

5.
Ivan Ivanovich, great russian Scientist does an experiment. He wants
to know how fast a thermometer falls down. He takes a thermometer and
a light, a candle light. He drops both from the 3rd floor and recognices
that they are reaching the ground at the same time. Ivan Ivanovich, great
russian scientific writes in his book: A theomometer falls with the speed
of light.

6.
Mathematicians never die - they only loose some of their functions.

7.
A math professor, a native Texan, was asked by one of his students: "What is mathematics good for?"
He replied: "This question makes me sick! If you show someone the Grand Canyon for the first time, and he asks you `What's it good for?' What would you do? Well, you kick that guy off the cliff!"

8.
Life is complex: it has both real and imaginary components.

9.
Q: What is the difference between a mathematician and a philosopher?
A: The mathematician only needs paper, pencil, and a trash bin for his work - the philosopher can do without the trash bin...

10.
Teacher: "Who can tell me what 7 times 6 is?"
Student: "It's 42!"
Teacher: "Very good! - And who can tell me what 6 times 7 is?"
Same student: "It's 24!"

Monday, February 11, 2008

Their Ages

Hello again!

THE PROBLEM:
"My husband's age," remarked a lady the other day, "is represented by the figures of my own age reversed. He is my senior, and the difference between our ages is one-eleventh of their sum."

How old are they?

The right answer you will find in comments.

Friday, February 1, 2008

Mrs. Anderson’s Age

Hello!

THE PROBLEM:
Paul: "Do you know, when the Andersons married eighteen years ago Mr. Anderson was three times as old as his wife, and to-day he is just twice as old as she?"

Ann: "Then how old was Mrs. Anderson on the wedding day?"

Can you answer Ann's question?

The right answer you will find in comments.

Monday, January 28, 2008

The Two Cars

Hi, everyone!

THE PROBLEM:

A man recently bought two cars, but afterwards found that they would not answer the purpose for which he wanted them. So he sold them for $1200 each, making a loss of 20%, on one car and a profit of 20%, on the other.

Did he make a profit on the whole transaction, or a loss? And how much?

Test yourself!
The right answer you can find in comments.

Monday, January 21, 2008

A Horse & A Man

Hi there!

THE PROBLEM:
A man has bought a horse for $300, and then he has resold it for $400. But later he has found more advantageous buyer, bought the horse back for $500 and sold it then for $600.

How much has the man earned?

The right answer you can find in comments.

Friday, January 18, 2008

The Problem about Bacteria

Hallo!

THE PROBLEM:
There are bacteria in a glass. In one second each of bacteria is gone divided in two, after that each of appeared bacteria in one second gone divided in two etc. In one minute glass is full.

In what time glass was half-filled?

What do you think about it?
The right answer you can find in comments.

Wednesday, January 16, 2008

The First Problem

Hi, everybody!

THE PROBLEM:
A salesman sells caps. One cap costs $20. A buyer agreed to purchase it, but he had only banknote $50. The salesman sent a boy with that banknote $50 to the neighbour to change. The boy came and gave $20+$20+$10. The salesman gave a cap and $30’ change. Not long after the neighbour came and told that $50 was bad money, demanded his money back. The salesman climbed in a cashdesk and returned him $50.

What loss was suffered by a salesman?

Try to answer.

Hallo & Welcome!

This blog was created for everyone who is interested in mathematics - in all senses.