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i think centre of mass has constant speed....

http://www.goiit.com/posts/list/community-shelf-fast-maths-37602.htm

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Ahmedabad

'FastMaths' is a system of reasoning and mathematical working based on ancient Indian teachings called Veda. It is fast , efficient and easy to learn and use.

Fastmaths will help you to

> Solve mathematical Problems 10 - 15 times faster
> Improve your intelligence
> Reduce burden [ Need to learn multiplication table up to 5 only ]
> Increase concentration

Example 1 :

Finding Square of a number ending with 5

To find the square of 75

Do the following

Multiply 5 by 5 and put 25 as your right part of answer.
Multiply 7 with the next higher digit ie (7+1)=8 gives
56 as the left part of the answer, Answer is 5625

Example 2

Calculate 43 X 47

The answer is 2021 Same theory worked here too.

The above 'rule' works when you multiply 2 numbers with units digits add up
to 10 and tenth place same

Example 3 : 52 X 58 = 3016 How long this take ?

Example 4: Multiply 52 X 11

Answer is 572

Write down the number being multiplied and put the total of the digits between 2 digits

52 X 11 is [ 5 and 5+2=7 and 2 ] , answer is 572

Example 5: Can you find the following within less than a minute?

a) 1001/13 ?

b) 1/19 ?

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i think (d) is correct.......

plzzzz vote if I m right.......

1/x= 3.5

so, x = 1/3.5=.28

putting x =0.28 in 1/x+2 we get 0.4385

Answer: 0.4385

plz rate if i am right.......

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