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#1 2011-02-15 12:15:01

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

What's 27 times 37 ?

Pretty neat, huh?


igloo myrtilles fourmis

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#2 2011-02-15 12:19:00

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,264

Re: What's 27 times 37 ?

Hi John;

How are you? I cannot see what you did.


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 2011-02-15 12:21:11

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

Re: What's 27 times 37 ?

The puzzle is what is 27 times 37 ? (pretty neat huh? the answer!!)


igloo myrtilles fourmis

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#4 2011-02-15 13:00:39

Mariner
Member
Registered: 2010-06-16
Posts: 35

Re: What's 27 times 37 ?

John E. Franklin wrote:

The puzzle is what is 27 times 37 ? (pretty neat huh? the answer!!)

the wonders of multiplication lol

Last edited by Mariner (2011-02-15 13:00:56)

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#5 2011-02-15 13:31:35

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

Re: What's 27 times 37 ?


igloo myrtilles fourmis

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#6 2011-02-15 14:59:59

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,264

Re: What's 27 times 37 ?

Hi John;

Yep, because of


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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#7 2011-02-19 03:57:50

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

Re: What's 27 times 37 ?

Yes, that's true!!! Bobby, I learnt that once a long time ago...
By the way, I just watched a short video on a short cut way
to multiply two numbers inclusively between 11 and 19.
Here's an example:
  Take 14 times 17, which we all know is 238 by heart anyway by now, but anyhow,
simply add 7 to 14 and get 21. Tack a zero on the
end of 21 for 210.  Then to finish, add on to the
210, 4 times 7 or 28 for 238, wow!!!  I'll put this in
"This is Cool" too, since it is so wonderful!!


igloo myrtilles fourmis

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#8 2011-03-01 09:33:56

BT
Member
Registered: 2005-10-06
Posts: 7

Re: What's 27 times 37 ?

Nice math trick!
Here are more to enjoy:
http://www.pedagonet.com/maths/mathtricks.htm

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#9 2011-04-20 01:02:46

alexa.pete9
Member
Registered: 2011-04-18
Posts: 11

Re: What's 27 times 37 ?

Start with any two-digit number. Multiply each digit by itself then add these answers. Do the same thing to this new number and so on until something happens. For example 32 becomes 9+4 which is 13, 13 becomes 1+9 which is 10, 10 becomes 1+0 =1. This one ends at 1. What else happens when you start with different numbers?

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#10 2011-05-04 05:50:01

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

Re: What's 27 times 37 ?

@alexa.pete9
  I'll try 33:
9 + 9 = 18
1 + 64 = 65
36 + 25 = 61
36 + 1 = 37
9 + 49 = 58
25 + 64 = 89
64 + 81 = 145
1 + 16 + 25 = 42
16 + 4 = 20
4 + 0 = 4
maybe that's the answer...
16 = 16
1 + 36 = 37
9 + 49 = 58
I'm starting to go in a circle now...


igloo myrtilles fourmis

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#11 2012-12-19 13:06:20

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,845
Website

Re: What's 27 times 37 ?

999
999
999


"Double the fun, double the thrill, double the coolness" - Julianthewiki

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