AMC 8 1995 Problem 12

AMC8 1995 年第 12

整除与因数★★★☆☆
Problem A lucky year is one in which at least one date, when written in the form month/day/year, has the following property: The product of the month times the day equals the last two digits of the year. For example, 1956 is a lucky year because it has the date 7/8/56 and 7×8 = 56. Which of the following is NOT a lucky year?
幸运年是指至少有一个日期,当写成月/日/年的格式时,满足:月份乘以日期等于年份的后两位数字。例如,1956 是一个幸运年,因为有日期 7/8/56 且 7×8 = 56。以下哪年不是幸运年?
  1. A.1990
  2. B.1991
  3. C.1992
  4. D.1993
  5. E.1994

正确答案 · Correct Answer

E

解析 · Solution

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