When you go inside the international trade fair, in Bangladesh, you need to buy a ticket. Where you will get a serial number, which said draw will be placed at 8pm every day. What is this? People come from far away to the trade fair, who can wait till 8 pm? Or who will come back to see the result at 8pm? So, almost all people throw away the ticket just after the gait. I think organizers can make a immediate draw that after buying a ticket you will know that you got a prize or not. Or, can announce it on web and within 15 days, if you can come back with your ticket you will get the prize.