# Math riddle

#### Jgtdragon

##### Diamond Member
How good are you in math? What is A?

7

#### chuckywang

##### Lifer
hard riddle....can it be done without pencil and paper?

42

#### ArmenK

##### Golden Member
how can dot-dot=dot sometimes and dot-dot=0 at other times?

edit: unless dot=zero... then A=1, but that doesnt really work

A = A
. = .

#### dighn

##### Lifer
Originally posted by: ArmenK
how can dot-dot=dot sometimes and dot-dot=0 at other times?

edit: unless dot=zero... then A=1, but that doesnt really work

i think "dot" can represent more than 1 digit

#### ArmenK

##### Golden Member
Originally posted by: dighn
Originally posted by: ArmenK
how can dot-dot=dot sometimes and dot-dot=0 at other times?

edit: unless dot=zero... then A=1, but that doesnt really work

i think "dot" can represent more than 1 digit

of course, dumb me

#### OulOat

##### Diamond Member
I'm pretty sure the A = 3, given that A and * are in the single digit range.

NM, 3 won't work.

Yeah, just checked all the single digits, no dice for any of them.

#### BigJelly

##### Golden Member
A=8

its long division of 3527876/484=7289

i have no life

becomes
...............7289
484|3527876
.......-3388
...........1398
............-968
.............4307
............-3872
................4356
...............-4356
........................0

It was actually kind of simple
once you learn you multiplication chart you would realize that the only possible numbers for A are 2, 4, 6, or 8 because only these numbers when multiplied by two different numbers have the same number at single digit #. IE 2*4=8 and 2*9=18
From this you you realize the only possiple combinations of A and ~ from *A~|****A** are 42, 62, 82, 24, 26, 28, 62, 64, 68, 82, 84 and 86.
Only 84 (A=8 and ~=4) works for A~*x=**AA and A~*y=**A.
Thus you get the 728z for the answer to the long division. z was very easy to solve because z had to be greater than 2 (4 digits) and couldnt contain a 8 (A). This left only z=3,4,5,6,or9. And only when z=9 does a 8 show up in the A position of *A*|****A**

#### Jgtdragon

##### Diamond Member
Originally posted by: BigJelly
A=8

its long division of 3527876/484=7289

i have no life

becomes
...............7289
484|3527876
.......-3388
...........1398
............-968
.............4307
............-3872
................4356
...............-4356
........................0