A lot of the time when you win a prize, it states that you have to answer a skill testing question in order to claim your prize. It's usually a math problem of sorts. I'm just wondering why they do this. Is it necessary?
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That's interesting. Seems like most countries already have some sort of national lotteries or a regional lotteries which are random. Does that mean some countries make you solve a math riddle to claim your lotto prize?