题目:用6枚同样大的硬币可以摆成一个“头”朝上的三角形(如图1),怎样移动两枚硬币,使三角形“头”朝下呢?【分析与解】解答本题的关键是选准要移动的两枚硬币。如果把6枚硬币编上号(如图2所示),移动的方法就很清楚了,如图3:把3号移到左上角,把5号移到右上角,三角形的“头”就朝下了。 Title: With six equally large coins can be put into a “head” up the triangle (Figure 1), how to move two coins, the triangle “head” down? [Analysis and Settlement] The key to answering this question is to choose the two coins you want to move. If you put 6 coins on the number (as shown in Figure 2), the method of moving is very clear, as shown in Figure 3: Move the number 3 to the upper left corner, the number 5 to the upper right corner, the triangle "Down.