[GMAT math practice question]
(number properties) \(a\) and \(b\) are positive integers. What is the value of \(b-a\)?
\(1) \frac{a}{b} = \frac{2}{7}\)
\(2) a+b\) is a two-digit integer greater than \(20\)
(number properties) \(a\) and \(b\) are positive integers. What is the value of \(b-a\)?
\(1) \frac{a}{b} = \frac{2}{7}\)
\(2) a+b\) is a two-digit integer greater than \(20\)
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