Is positive integer n divisible by 3 ?
(1) n^2/36 is an integer.
(2) 144/n^2 is an integer.
答案A
Are positive integers p and q both greater than n ?
(1) p - q is greater than n .
(2) q > p
答案C
請問這2題該怎麼想
謝 <(_ _ )>
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