OG(11th) DS 109

[hungji]

Are positive integers p and q both greater than n ?

(1) p - q is greater than n
(2) q > p




答案 C 供大家參考

[hungji]

自己 推 一下

(1) p-q>n, p>n+q, thus p>n since q is positive integer
but q<>n undecided NOT SUFFICIENT

(2) q>p only, the pqn relationship is not dediced
NOT SUFFICIENT

BUT together (1)(2) is SUFFICIENT.
答案 C