There are a couple of grocery shops I have done where you are allowed to purchase a lottery ticket. But as for a required knowledge question, no, I'm with Lisa, your question would have to be one that evaluates their knowledge and ability to explain something to you. But maybe you will ask "Can I get a lottery ticket here?" and get a yes answer. Then your shop will be declined because you didn't evaluate the employee's knowledge but if you win the lottery, you won't care.