Amazing Numbers - on cards

I showed the Amazing Numbers, printed on cards, to several people during lunch. They were amazed at my ability to guess the number that they picked.

When I showed them the secret, the were even more amazed. They asked me, "How did you generate the numbers on the cards".

Can you guess the secret? Do you know how I generated the numbers?

http://www.tankinlian.com/amazing/index.html

I have decided to make 1,000 sets of cards to be sold at a modest price or given away.