作者a2515125 (Bobshih)
看板GMAT
標題[計量] pp2 DS
時間Mon Sep 21 01:10:28 2009
What is the value of the positive integer m ?
(1) When m is divided by 6, the remainder is 3.
(2) When 15 is divided by m, the remainder is 6.
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【答案】B
我想求證 B 真的對嘛
(2)可以求出m?
(1) m=6n+3
照道理
(2)15=mx+6不是嘛
如何求得?
感謝
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推 nickyang:沒那麼複雜,除了9以外沒有任何正整數可以讓15除了之後餘 09/21 01:20
→ nickyang:6,這題不用除餘定理 09/21 01:21