長針與短針成一直線 - 拼圖
By James
at 2007-12-12T20:26
at 2007-12-12T20:26
Table of Contents
當時鐘轉到三點和九點時,時針和分針的位置剛好成一個直角(九十度),這是大家都知
道的事。
但是長針和短針的方向相反而呈一直線(一百八十度),而且短針恰好指在整點的刻度上
,這樣的情形一天之中只有兩次,請問是幾點幾分?
puzzlez
2007/12/11
--
道的事。
但是長針和短針的方向相反而呈一直線(一百八十度),而且短針恰好指在整點的刻度上
,這樣的情形一天之中只有兩次,請問是幾點幾分?
puzzlez
2007/12/11
--
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