adminIt is a math trick so unbelievable that it will stump you.
Personally I would like to know who came up with this and
why that person is not running the country.
1. Grab a calculator. (you won’t be able to do this one in your head)
2. Key in the first three digits of your phone number (NOT the area code)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last 4 digits of your phone number
7. Add the last 4 digits of your phone number again
8. Subtract 250
9. Divide number by 2
Do you recognize the answer?
| 2.5 |
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Saturday, January 12th, 2008 at 9:05 am
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January 12th, 2008 at 10:18 am
erm, my phone number only has 6 numbers?…I think you should at least say “If you’re in certain parts of Britain, this doesn’t work, so get lost…”
Although I just added the last number from my area code, and it worked quite well…hilarious…
January 12th, 2008 at 10:19 am
eh, it is very easy to see how this works. the final processes simple cancel out the who “multiplication” process, leaving you with only the numbers which were unique to you.
January 12th, 2008 at 11:46 pm
This only works with 7 digit phone numbers.
This is a little algebra problem.
Let X denote the first three digits of
the phone number and Y the last four digits. Then let’s take the
calculations a step at a time.
Skip the grab a calculator step - 1 = Key in the first 3 digits.
1-X
2-80X
3-80X + 1
4-250 (80X+1) or 20,000X + 250
5-20,000X + 250 + Y
6-20,000X + 250 + 2Y
7-20,000X + 250 + 2Y -250 or 20,000X + 2Y
8-(20,000X + 2Y)/2 or 10,000X + Y
No matter what your phone number is, the final number will repeat your
phone number. The 10,000 multiplier is needed to move the first three
digits over four decimal places).
January 13th, 2008 at 6:04 am
I’ve got a real trick
it is easy
it works only in the range of 11 -20
so it works:
for example: 16*18
you take 16 and add 8 (or the other way . 18+6)
then you’ve got 24 then you hang a 0 behind the last number :240
then you multiply 8 and 6 : 8*6= 48
then you add 48 and 240 and you got the result : 288
but watch out: only in the range of 11 to 20 it works
have fun
January 18th, 2008 at 6:34 am
= [ { ( 80 x A + 1 ) x 250 } + B + B - 250 ] / 2
expanding…
= [ { ( 80 x A x 250 + 250 } + B + B - 250 ] / 2
= [ 80 x A x 250 +250 +(2 x B) - 250 ] / 2
rearranging…
= [ 80 x A x 250 + (2 x B) ] / 2
= [ 2 x 40 x 250 x A + 2 x B ] / 2
= [ 40 x 250 x A + B ]
= [ 10000 x A + B ]
So if you have A = 747 and B = 1234 then you will have 7471234.
Now tell your president to leave the house, I’m taking over.
January 18th, 2008 at 6:53 am
its a nice trick, but not smart enough for that person to be ruling a country.