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#1 2010-08-05 19:29:56

bhavik.shah
Member
Registered: 2010-08-05
Posts: 4

magic of numbers

now lets see what you have brains or not
5+3+2=151012
9+2+4=183662
8+6+3=482466
5+4+5=202504
then
7+2+5=?????

it's a challenge... prove it.

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#2 2010-08-05 20:34:41

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,688

Re: magic of numbers

Hi bhavik.shah;

Welcome to the forum!


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#3 2010-08-06 07:47:54

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,562

Re: magic of numbers

Hi!! Welcome!!  I think bobby got it right.


igloo myrtilles fourmis

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#4 2010-08-06 09:34:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,688

Re: magic of numbers

Hi;

Maybe he did, but shouldn't we ask that big know it all what exactly his thought processes were. Looks like luck to me!


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#5 2010-08-06 19:28:57

bhavik.shah
Member
Registered: 2010-08-05
Posts: 4

Re: magic of numbers

the answer is absolute correct.....
congo man
u such a briliant guy......
the other way to get last two digit number is:
multiply 1st and 2nd=A
multiply 2nd and 3rd=B
and then A+B=CD
and the ans=DC

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#6 2010-08-07 08:23:48

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,688

Re: magic of numbers

Hi bhavik.shah;

Your second method is algebraically the same as my method:

For 3 values a,b,c: Mine is on the left and yours is on the right.

(a + c)b = ab + cb


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#7 2010-08-08 22:29:02

bhavik.shah
Member
Registered: 2010-08-05
Posts: 4

Re: magic of numbers

yes perfect catch
u r such a briliant guy.. bobbym

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#8 2010-08-09 07:04:41

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,688

Re: magic of numbers

u r such a briliant guy.. bobbym

It is hard to argue with that unless you are not me.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

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