Bunuel wrote:

If m and n are integers such that mn ≠ 0, what is the value of m/n?

(1) m - n = 8

(2) (m + n)(m - n) = 0

Question : what is the value of m/n?Statement 1: m - n = 8There are multiple scenarios e.g.

m = 9 and n = 1 and m/n = 9

m = 10 and n = 2 and m/n = 5

NOT SUFFICIENT

Statement 2: (m + n)(m - n) = 0i.e. m^2 - n^2 = 0

i.e. m^2 = n^2

i.e. m/n =

+1

NOT SUFFICIENT

COmbining two statementwe get that m-n = 8 i.e. m+n = 0 because product given as m + n)(m - n) = 0

m+n = 0

i.e. m = -n

i.e. m/n = -1

SUFFICIENT

Answer: option C

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