[Shrek3]

This is a simple but wicked puzzle which would scratch the grey matter for a while.
If you can solve it then enter your name in the Winners List



Here is the matrix for the judgement:

* If you're a Math Teacher, you should be able to solve it in under 60 seconds
* if you're a Detective, in 2 minutes
* if you're a Pilot, in 3 minutes
* if you're a Doctor, in 5 minutes
* if you're an Accountant, in 10 minutes
* if you're a Lawyer, in 30 minutes
* if you're a Salesman, in 1 hour
* If you're a Politician or a Blonde, probably never!

If you think it is too easy then here is the difficult version

[martin14]

i know the answer




















13

less than 2 minutes

[Brenda]

13, 35 seconds

[herbie]

60 secs with a massive hangover...

[Brenda]

Got the other one in under 2 minutes.
Easy

[Zipperfish]

Under two minutes. Did it the hard way though, using matrix algebra.