推 oranger:了解~~~謝謝!!!:) 08/01 01:04
※ 引述《oranger (從新出發)》之銘言：
: June 25, 1982, fell on a Friday.
: On which day of the week did June 25, 1987, fall?
: ( note: 1984 was a leap year)
: Ans: Thusday
365/7=52...1=>表示一年後的同一天星期數+1
潤年:366/7餘2=>+2
1983~1987有1983567四個正常年,1984一個潤年=>總共4+2=6
從星期五往後數6下:六日1234,星期四
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