HCF & LCM 2018-04-23.pdf - HCF LCM 100 40 24 100 1 1978...

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評語 : 1) 1978 Q11 8abc 3 is the H.C.F. of 24ab 2 c 3 and (4 分數 ) A. 12a 2 bc 4 . B. 30a 2 bc 3 . C. 32a 2 bc 5 . D. 40ab 2 c 3 . E. 48a 3 bc 5 . 解釋 : -- 參考資料 : -- 評語 : 2) 1980 Q35 The H.C.F. of two unequal positive integers a and b is 8 . Which of the following(s) must be true? (1) The difference between a and b is divisible by 8 . (2) (a + b) is divisible by 16 . (3) ab is divisible by 64 . (4 分數 ) A.(3) only B.(1) and (2) only C. (1) and (3) only D.(2) and (3) only E. All of them 解釋 : -- 參考資料 : -- 評語 : 3) 1981 Q33 The H.C.F. and the L.C.M. of three expressions are a 2 b 2 c and a 4 b 6 c 4 respectively. Two of the expressions are a 2 b 3 c 4 and a 3 b 2 c 2 . The third expression is (4 分數 ) A. a 3 b 3 c . B. a 3 b 6 c 4 . C. a 4 b 2 c . D. a 4 b 6 c . E. a 4 b 6 c 2 . 解釋 : -- 參考資料 : -- 評語 : 4) 1983 Q05 The H.C.F. of a 3 1 and a 4 1 is (4 分數 ) A.1 . B.a + 1 . C. a 1 . D. a 2 + 1 , E. a 2 1 . 解釋 : -- 參考資料 : -- 評語 : 5) 1985 Q06 The L.C.M. of 2a 2 2b 2 and a 3 2a 2 b + ab 2 is (4 分數 ) A. a b . B. a(a b)(a + b) . C. 2a(a b)(a + b) . D. 2a(a b) 2 (a + b). 分數 4/4 4/4 4/4 4/4 4/4 HCF & LCM 時限 : 40 問題數量 : 24 滿分 : 100 總分 100
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E. 2a(a b) 3 (a + b).
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