If x, y, and z are positive numbers, is x - y < z - The Beat The GMAT Forum

If x, y, and z are positive numbers, is x - y < z?

(1) x + y < z
(2) xy < z^2

What's the best way to determine whether statement 1 is sufficient?

OA A

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by mbawisdom » Sat Mar 10, 2018 5:12 am

lheiannie07 wrote:If x, y, and z are positive numbers, is x - y < z?

(1) x + y < z
(2) xy < z^2

What's the best way to determine whether statement 1 is sufficient?

OA A

How did you approach number 1?

x = x
x - y < x + y (since y is positive)
x - y < x + y < z
x - y < z

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