Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

Login

Username

Password

Not registered yet?

#1 2011-02-16 11:15:01

John E. Franklin
Star Member

Offline

What's 27 times 37 ?

Pretty neat, huh?


igloo myrtilles fourmis
 

#2 2011-02-16 11:19:00

bobbym
Administrator

Offline

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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.
 

#3 2011-02-16 11:21:11

John E. Franklin
Star Member

Offline

Re: What's 27 times 37 ?

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


igloo myrtilles fourmis
 

#4 2011-02-16 12:00:39

Mariner
Member

Offline

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 (2011-02-16 12:00:56)

 

#5 2011-02-16 12:31:35

John E. Franklin
Star Member

Offline

Re: What's 27 times 37 ?


igloo myrtilles fourmis
 

#6 2011-02-16 13:59:59

bobbym
Administrator

Offline

Re: What's 27 times 37 ?

Hi John;

Yep, because of


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.
 

#7 2011-02-20 02:57:50

John E. Franklin
Star Member

Offline

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
 

#8 2011-03-02 08:33:56

BT
Novice

Offline

Re: What's 27 times 37 ?

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

 

#9 2011-04-20 23:02:46

alexa.pete9
Member

Offline

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?

 

#10 2011-05-05 03:50:01

John E. Franklin
Star Member

Offline

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
 

#11 2012-12-20 12:06:20

mathaholic
Star Member

Offline

Re: What's 27 times 37 ?

999
999
999


246 pages on Prime Numbers Wiki (+1)
 

Board footer

Powered by FluxBB