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# Fun with math

Discussion in 'Chit Chat' started by CaptainObvious, Dec 11, 2008.

1. ### CaptainObvious

or is this simple arithmetic? Anyway, give it a whirl.

1. First of all, pick the number of times a week that you would like to go out to eat.

(more than once but less than 10)

2. Multiply this number by 2 (just to be bold)

4. Multiply it by 50

6. Now subtract the four digit year that you were born.

You should have a three digit number

The first digit of this was your original number. ( I. e., How many times
you want to go out to restaurants in a week.)

The next two numbers are

YOUR AGE ! ------ (Oh YES, it is!)

2. ### Lucrum

Seems like I saw this somewhere before - the IRS Form 1040 instructions maybe?

3. ### Smart Money

Yes, they forgot the last line:

"If your age is greater than 5, or your favorite number is between zero and eleven, you must recalculate using the alternative minimum tax".

4. ### maxpi

The Obama version is: on line 1 write your annual income. Send the amount on line 1...

BTW, I love those mathy things and cannot figure out how they work but they are fascinating...

5. ### Lucrum

Well, at least he simplified it.

I suppose that counts as "change".

6. ### Smart Money

Nah. When you select a number, select "X", and then do the things it says. Like if it say add 100, you get:

x + 100

Then when it says double it, you get 2X + 200 etc.

Heck you can make them up:

Here's one:

Pick a number between one and 100:

(X)

(X + 50)

(4X + 200)

Subtract four times your original number:

(200)

Subtract 101

(99) <= note that at this point, it doesn't matter what they started with...they will have "99", even if several people did it starting with different numbers.

Continuing

(99 - age)

Tell me what that number is

(participant says, "64")

Then you calculate: If 99 - age = 64

Then algebraically, age = 99 - 64

So you just take 99 and subtract the number they called out (i.e., 64), which is easy to do in your head since no borrowing is required.

99 - 64 = 35...So their age is 35

Then you just announce their age in a kind of shock and awe tone.

SM

7. ### FortuneTeller

That is some scary stuff. Not the math equation, but my age. I didn't realize I was this old.

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