In the case of the Tic Tac Toe game, he said the trick hinged on where single numbers, rather than repeating ones, appeared on the unscratched card.
Srivastava tested out his hunch and found some startling results: he could pick out a winning game card with 90 to 95 per cent accuracy.
He chalks up his ability to crack the system behind such games to "a kind of odd combination of skills" -- including knowledge of statistics, computer programming and spatial analysis.
There's a guy at Hopper's with the same talent. Only, his name's not Mohan and he doesn't feel quite so obligated to share it with the authorities...