My AI startup tried 'nerd-sniping' by posting math puzzles with a hidden message all over San Francisco. It worked.

My AI startup tried 'nerd-sniping' by posting math puzzles with a hidden message all over San Francisco. It worked.
Felicia Tang, chief of staff at startup Exa, shares a creative approach to hiring in San Francisco by using math problems as a treasure hunt to attract smart and curious individuals.