wonderful mathematics

[Former Member]

Hi All,

Hope every one finds chill...recently i come across some beautful subject..which i love most i.e. mathematics....

i love to share one simple trick ..hope if u also have pls welcome..

if we want to multiply any 2 identical number of 2 digits

just like ex: 25 * 25 --> juts first mulitply

5 * 5 = 25..

not 2 next is 3 replace first number by2 * second number 2 =

3 * 2 = 6.

add them now 625 is the answer

another

15 * 15 = (2 * 5) (5 * 5) = 225

i am just writing here so that it could me use for some one also!!

and if u have one pls share like this tricks

regards

sas

[Former Member]

Here's another method for multiplying numbers

Normally when askeds to solve a multiplication of two 2-digit numbers you solve it like this:

e.g.

23

96*

first you add 6 * 3 + 6*20

and then add 90 * 3 + 90*20

which is

138

2070+

= 2208

Here's a different method with which you can solve this easily from the top of your head.

23

96*

a. 3 * 6 = 18 write down 8 remember the 1

8

b. 2 * 6 (12) add that to 9 * 3 (27) and add the 1 = 40 write down 0 remember the 4

08

c. now 2 * 9 = 18 + 4 = 22

2208

You can also do this with multiplications like

ABC

DEF*

But then you have to do CF, BF+ EC, AFD*CBE, AE+DB and finally AD

e.g.

456

789*

a. 6*9 =54

4

b. 59+86+5=98

84

c. 49+765*89= 127

784

d.48+75+12= 79

9784

e. 4*7+7= 35

359784

Now why didn't they tought me that at school.

[Former Member]

nice one...

[Former Member]

Actually, it's a long known fact for the square of 2-digit numbers ending with 5:

Number: X5

Square = X(X+1)100 + 25

Examples:

35^2 = 3(3+1)100 + 25 = 1200+25 = 1225

75^2 = 7(7+1)100 + 25 = 5600+25 = 5625

etc.

[matt]

For really inane posts, I propose the General Discussion area of SAPFans.

Now, back to the subject in hand. A few things.

It takes just 23 random people for the odds of two sharing the same birthday to be 0.5. And if you have just 40 people those odds rise to 0.9.

Take 85 people from uk. 5000 primary schools in total. 0.5 chance that 2 of the 85 went to same primary school.

e raised to power of pi times i, plus 1 equals 0.

Apparently, there's an axiom you can add to ZF set theory called the Axiom of Choice. ZF theory is fundamental to nearly all mathematics. With the Axiom of Choice, you get ZFC set theory. The axiom of choice says that if you have a set A, which is a set of sets, then you can construct another set B, who's members comprise of one member of each of the sets within A.

This doesn't seem unreasonable.

However, it leads to, for example, a proof that there exists a series of translations and rotations that will transform five suitably defined sections of a unit sphere, into two unit spheres. i.e. from one sphere, just doing translations and rotations, you get two.

matt

[Former Member]

This message was moderated.

[former_member233812]

Careful with that axe.

[JanStallkamp]

Hi.

If you need to impress someone with your mathematical skills (maybe he/she isn't impressed by SDN points) use the following: multiply two nine-digit numbers without writing down any subresults. If you are not willing to train very long for that you just have to manage to specify one of the numbers. Chose 142857143. For most people this number looks quite random but it is very easy to multiply it with any other nine-digit number. If you already know this don't post it at once. Let the others try to find out the trick...

/Jan

[ThomasZloch]

it's really boring that one can just google that [stuff|http://psyc.queensu.ca/faculty/butler/calculat.htm#2] up so quickly these days...still intriguing though.

[JanStallkamp]

Sometimes I miss the times before google existed... When I first heard about this I spent an afternoon finding out how it works...

[Former Member]

Trying to apply the new rules of engagement and moderate the thread?

Just relax, dear!

[JanStallkamp]

>

> Trying to apply the new rules of engagement and moderate the thread?
> 
> Just relax, dear!

Sorry, I don't understand you here... Haven't seen any moderation in this thread and neither 'wonderful' nor 'mathematics' is a word in the subject that would make me close a thread. In fact I like that kind of discussions.

/Jan

[Former Member]

There was an earlier post removed...rightly, i assume it was referencing that?

[ThomasZloch]

and I like your work in the ABAP forums. We'll see how quickly the word spreads and you have actually less to do...

[JanStallkamp]

Ah, I see. No, I haven't deleted that one. I saw it in the abuse report but did not take an action. Coffee corner is a place where I like to read and not to delete

/Jan

[Former Member]

This message was moderated.

[Former Member]

There was a thread removed, it was reported as abuse 5 times and automatically triggered the removal process.

[Former Member]

OMG My pocket protector is jumping out of my shirt pocket from reading this thread. I am so excited the bandaid holding my bifocals together is coming undone !

[Former Member]

LOL!!

[Former Member]

88.2% of Statistics are made up on the spot

[Former Member]

hehehhe. "You can say anything is true by just adding a statistic - 78% of people know that!" - Homer Simpson.

[pokrakam]

>

> 88.2% of Statistics are made up on the spot

Bother, I always thought it was 87.1%!

[Former Member]

Ha..Ha..Ha..

I Feel Almost 99.99% of our coffee corner members

(Includes our supervisors --> moderators) are of great sense of humour.

Regards

Sas

[Former Member]

If you divide the number of threads in coffee corner by the time elapsed since the foundation of SDN, you get the ration of human mind's decay.

[Former Member]

you get the ration of human mind's decay

Being a human being we Should Have Some

Art Feeding yar!!

Other wise its useless of this knowledge or money what ever you gain in this world!!Be optmistic friend

Regards

sas