There seems to be a lot of interest in the Sumerian Numerals Puzzle ‘*Synapses’* from Assassin’s Creed 2. I’ll start with the full solution for any gamer who’s interested...

SOLUTION

The different pieces of information on this puzzle screen all relate to the final solution.

1) First things first, the wine glass-like symbol is the sumerian number 1, and the horizontal A symbol is the sumerian number 10. The hint will tell you this. I’ll refer to sumerian 1 as **S1** and sumerian 10 as **S10 **from here on.

2) Notice in the bottom right there is a number 5 written beside a **S1. **Rotate the code wheel so the number 5 is aligned to the **S1 **symbol.

3) Now for the potential head scratching section. Notice the addition expression within the image on the left: **S1** + 2 + 6 + 2 + 1 + 5 + 3 + 5 + 6 + 4. Taking into account that the **S1** = 1, add the first pair of numbers, **S1** + 2 = 3. Now add the resulting 3 to the next number 6. Repeat and you should end up with the following values:

**S1** + 2 = 3

3 + 6 = 9

9 + 2 = 11

11 + 1 = 12

12 + 5 = 17

17 + 3 = 20

20 + 5 = 25

25 + 6 = 31

31 + 4 = 35

These resulting values correspond to the sumerian numerals on the code wheel.

4) Look at the password section of the screen, it reads 6,0,3. With the code wheel now aligned correctly, the number 6 corresponds to sumerian number 3. Looking at the outer sumerian section of the wheel, the two blanks corresponding to the 0 and 3, according to the sequence above, will be sumerian 17 and sumerian 31 respectively.

No doubt there will be a myriad of stereotypical gamers who will brag that for them this puzzle was a ‘no brainer’. Needless to say, the combined efforts of two engineers and a mathematician still required some old fashioned ‘head against brick wall’ moments to get to the bottom of *Synapses*. Take it all with a pinch of salt.

Sumerian numerals are interesting in that they do not have a digit zero, nor do they have a concept of zero, similar to Roman numerals. The idea of nothing or zero is not included in the symbol notation.This number system uses sign value notation , ie. symbols representing a number added together to form new numbers. Thinking of zero as an actual number, rather than the lack of, helps us.

If you are interested in mathematics, you’ll probably know you cannot divide by zero. Try dividing 2 by zero on a calculator; Math Error by any chance? Thinking about it too much will fry your brain! However, there are times within the Mathematics that I have studied, when it was required to simply use zero through the process or calculation, treating it no differently to any other number. This idea is the driving force of our decimal system of today.

ahhh i could've NEVER figured that out on my own, i'm so close though i just have 1 more truth to solve, so far this is the only one i've had to cheat on....THANKS!! >.<

Posted by: Merus Atrox | May 19, 2010 at 05:55 PM

A pleasure to be of help!

Posted by: charles lees-czerkawski | May 19, 2010 at 06:57 PM

jenious! thanks!

Posted by: romnon5 | August 26, 2010 at 09:00 PM

Omg the solution is even harder than the puzzle itslef...Nah just kiddin, thx a lot :)

Posted by: mody | February 17, 2011 at 06:09 AM

Thaaaaaaaaaank you!! This puzzle literally made my mind and my dad's mind go boom!

Posted by: Emily | February 23, 2011 at 10:28 PM