The product of 3305 and the 1-digit integer x is a 5-digit integer. The units (ones) digit of the product is 5 and the hundreds digit is y. If A is the set of all possible values of x and B is the set all possible values of y, then which of the following gives the members of A and B?
A B
{1,3,5,7,9} {0,1,2,3,4,5,6,7,8,9}
{1,3,5,7,9} {1,3,5,7,9}
{3,5,7,9} {1,5,7,9}
{5,7,9} {1,5,9}
这种题目就慢慢试吧
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