stevenator65

You may have seen this before, but for those who haven't it's really interesting:

1.Grab a calculator
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 by 250
9.Divide by 2

Do you recognize the answer?

Tankman

Originally Posted by stevenator65

Do you recognize the answer?

The number of disappointed Cubby fans in West Chicago?

That was too easy. Have any more mathematical mind benders?

reese

nice trick!

stevenator65

Ok, here's another. What's the largest number you can write with just 3 digits? If you like these I have plenty more.

aximbigfan

999


chris

stevenator65

999 is incorrect. Please try again.

Ken S

how about 'ten'

uzziah0

x = first three digits of phone #,
y = last 4 digits of phone #

Here is a straight equation for the above:
(((((x * 80) + 1) * 250) + y + y) - 250 ) / 2

a little rearranging:
(((250 * (80x + 1)) + 2y) - 250) / 2
and spreading the / 2:
125 * (80x + 1) + y - 125
125 * 80x + 125 + y -125
125 * 80x + y
10000x + y

uzziah0

I can hold my pencil with three digits and write as large a number as I want.

stevenator65

Originally Posted by Ken S

how about 'ten'

10 is incorrect. The number must contain 3 digits.

Uziah, that was a very cool formula. But if you make people solve it it's not as fun as a word problem .

uzziah0

Gotta' solve 'em!

Ken S

how about E99

stevenator65

E99? That's incorrect. What is that number? This problem uses actual numbers, not variables. Keep guessing. I have a feeling you're on the right track even though I don't know what E99 is.

kor

How about 9^9^9

andy

uzziah0

FFF = 4095 (hex to decimal)

I 'r an engineer!