Re: Unbelievable Math Problem!Jan 26, 2008
2. Multiply by 80
This is a start, 80 X 123 is not 1230000, but keep in mind
that if you multiply 123 X 80 X 250 you would get 2 X
1230000, which would be easy to get back to 1230000 if you
divided by 2.
3. Add 1
Don’t worry, if you add 1 to 80 X 123 before you multiply by
250, you can still back this out later when you subtract
250. Adding (1 X 250) – 250 is the same as adding 0.
So far, we have (123 X 80) + 1.
4. Multiply by 250
So now we have (123 X 80) X 250 + (1 X 250), which is the
same as (2 X 1230000) + 250. Later we will subtract the
250 and divide by 2.
5. Add the last 4 digits of your phone number
We could have waited until the end to add the last 4 digits
to 1230000, but since we are doing it now we will have to add
it twice in order to get back to it when we divide by 2.
6. Add the last 4 digits of your phone number again.
So now we have (123 X 80) X 250 + (1 X 250) + 4567 +
4567,
which is the same as
(2 X 1230000) + 250 + (2 X 4567).
7. Subtract 250
Now we start simplifying back to our phone number. We remove
the 250 from above by subtracting and get (2 X 1230000) + (2
X 4567).
8. Divide number by 2
Then we knock it down to half, by dividing by 2 we get
(1230000 + 4567).
VOILA!
1230000 + 4567 = 1234567.