September 27th, 2006 . by Vanaja

There are 11 faces in the picture. Can you find them all?

For a clearer view you can click the picture and download it. Or press F11.

Normal people find 5 or 6.If you find 8 you have a good sense of observation.

(Of course observation is very essential for learning Mathematics)

If you find 9, your sence of observation is above average.

If you find 10,you are a very good observer.

If you find 11, you are an extreamly good observer.

Posted in Illusions ** | **
1 Comment »

September 26th, 2006 . by Vanaja

**You may be amazed to hear that people have bothered to dream of jokes with a mathematical theme. Here is a few to keep you going. **

• ‘Old mathematicians never die’-they just lose their functions.

• ‘Mathematicians don’t sin-they sine, and always have a nice tan but are forever going off on a tangent.

• Math teacher mum talking to her son-…..’ if I have told you n times I have told you n+1 times’

• What do you call a tea pot of boiling water on top of Mount Everest- H ypotenuse( high pot in use)

>• WHY IS 6 AFRAID OF 7? -Because 789 (7 ate 9)

• What is the sine of 40?- Over the hill.

• What did one math book say to another book?- I have lots of problems.

• SON: Dad, will you do maths homework for me tonight ?

FATHER:No son, it wouldn’t be right.

SON: Well, you can try.

Posted in Math Humour ** | **
No Comments »

September 25th, 2006 . by Vanaja

Today we can have a number problem.O.K?

On his way to school, Jim is knocked down by a car.

He noticed the number of the car.

• The digit in thousand’s place is 4 times the digit in unit place

• The digit in ten’s place is half of the digit in thousand’s place

• The digit in hundred’s place is 3 less than the digit in ten’s place

• Two is in the unit place

Find the number.

I think it is very easy to find out.

Ans: 8142

Posted in Puzzles ** | **
No Comments »

September 24th, 2006 . by Vanaja
**The Law of Cosines**

In any triangle ABC ,

If we know the three sides of any triangle, we can find the angles of the triangles using this formula.

**Example: **

In a triangle ABC, given a=25, b=52, c=63. Find A

**Ans.**

We have

Posted in Trigonometry ** | **
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September 20th, 2006 . by Vanaja
I think yesterday you had a big laugh after reading math genius. So today we are fresh and can have some lessons from Trigonometry.

We know the three sides and three angles of a triangle are called its parts. The process of finding the unknown parts of a triangle from its known parts is known as solution of a triangle. This has many applications in surveying, navigation, astronomy and other sciences.

In a Triangle ABC, The angles are denoted by A,B,C and the lengths of the corresponding opposite sides BC, CA and AB by a,b, and c respectively.

**The Law of Sines**

Using this formula we can find solutions of a triangle.If any three parts are given, we can find the other three parts.

Posted in Triangles, Trigonometry ** | **
1 Comment »

September 19th, 2006 . by Vanaja
Many and many people from USA and UK are looking India for getting tutoring.You will get a tutor for very low fee. And quality tutoring is guaranteed.Read more

Posted in Math Articles ** | **
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September 19th, 2006 . by Vanaja
Yesterday I visited a blog. I found this post. I couldn’t stop laughing.

Click here to view that post.

Posted in Uncategorized ** | **
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September 18th, 2006 . by Vanaja
**See the picture below**

Can you tell me the answer?

It’s an optical illusion.The hypotenuse of both triangles seem to be straight lines but they’re not.

I think the answer lies in the fact that neither shape is actually a triangle, they are quadrilaterals. They have four sides.

The side that looks like it is the hypotenuse is actually two sides, the corner being where the green and red triangle.

I have searched the web and find an answer here.

If you have any good explanation about this please let me know.

Posted in Illusions, Puzzles ** | **
1 Comment »

September 12th, 2006 . by Vanaja
There are 10 trees spaced out equally along my street with one at each end. If I run at a steady speed from one end of the street, I can reach the 5 th tree in just 5 seconds.

How long would it take me to run down the whole street at the same pase?

( No, it is not 10 seconds)

Did you get the answer?

*When I reach the 5 th tree I cover 4 trees.*

*So,time taken to cover 4 trees is 5 seconds.*

*So, time taken to cover 1 tree is 5/4 seconds.*

*When I reach the 10 th tree I cover 9 trees.*

*So, time taken to cover 9 trees( and this is same as the time taken to run down the whole street) is 9 multiplies 5/4 *

*ie 45/4*

*or*

**11.25 seconds**

Posted in Algebra, Puzzles ** | **
2 Comments »