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If x is a positive integer, is (10x - 1) divisible by y
(1) x is a multiple of y
(2) y is a prime number
What's the best way to determine whether statement 2 is sufficient? Can any experts help?
(1) x is a multiple of y
(2) y is a prime number
What's the best way to determine whether statement 2 is sufficient? Can any experts help?