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Of the positive integers that are multiples of 30 and are le

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Of the positive integers that are multiples of 30 and are less than or equal to 360,what fraction are multiples of 12?（A）1/6 (B)1/5 (C)1/3 (D)2/5 (E)1/2 书后的答案是E,
Of the positive integers that are multiples of 30 and are le
答案当然是e
这个问题是在问在小于360的正整数里,可以被30整 除的数字里,有多少可以被12整除?.首先,我们知 道一个有12个数字可以被30整除,那就是30,60,90,...在这其中,30,90,150,.是不 能被12整除的.而60,120,.是可以被整除 的.所以,有1/2是可以的.这就是答案给的1/2..
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