A remember seeing a mentalist once in london, not sure of his name but he performed an effect were 4 specs choose random 2 digit numbers and when wrote in a line the 8 figures matched with a rolled posted in his back pocket.

is there an effect this clean?

This is your standard Add-A-No effect. You can find countless variations in many books and DVDs.

Greg

Are you talking about this kind of effect? maybe even this exact performance?

http://www.youtube.com/watch?v=gxJtlJ4eze4

What Greg said. There are many ways to do this, and what you're describing doesn't sound particularly exciting to me!

That Derren version is not in countless books and dvds

I would check out a John Riggs's add a Riggs, It's a great approach to what you may be lookinhg for.

Daren

Thanks for the answers,

it may not sound exciting but it doesn't mean it will be presenting in a boring way

It doesn't sound like an add a no to me, as he said when the digits are read in a line not added together.
Yes if they right them down you could use the add a no principles but it sounds more like a lottery confab to me. Perhaps Owens? This way the numbers are called out. don't have the effect myself but I believe that this is the way it plays.