A man went to an underwear company for a job interview...
The manager says, "If you can answer these 3 questions right, the job is yours."
'We pack our underwear in 7-packs, 5-packs and 12-packs. Why?'
The man thinks for a moment and replies:
"'The 7-packs are for Indian men; one for each day of the week.'
'The 5-packs are for American men; one each for Monday to Friday, and they don't wear underwear on weekends.'
'The 12-packs are for Pakistani men: one each for January, February, ... '"
He got the job.