Re: [計量] 請教三題
※ 引述《vodos (勇者無懼)》之銘言：
: 題目看不太懂 可以幫我嗎 感謝!
: 1. S is the sum of three consecutive integers, the greatest of which
: is x. In terms of S, which of the following is the sum of three
: consecutive integers, the least of which is x ?
: (A) S-6 (B) S-3 (C) S+3 (D) S+6 (E) 2S 答案 D
: ------------------------------------------------------------------------
: 2. 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 答案 E
30乘上1~12 小於等於360 共12個
30= 2x3x5
要滿足是12的倍數 只要 30再乘上2以上的偶數即可
所以 2,4,6,8,10,12 總共六個
答案就是 6/12=1/2
: ------------------------------------------------------------------------
: 3. If x is an integer and x平方 < 37 , what is the greatest possible value
: of x minus the least possible value of x ?
: (A) 5 (B) 6 (C) 10 (D) 12 (E) 36 答案 D
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