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为什么下水道的井盖是圆的?美国有多少辆车? (一个常见的类似问题是:美国有多少家加油站?)美国有多少个下水道井盖?你让某些人为你工作了七天,你要用一根金条作为报酬。这根金条要被分成七块。你必须在每天的活干完后交给他们一块。如果你只能将这根金条切割两次,你怎样给这些工人分?
Why is the manhole cover round? How many vehicles in the United States? (A common question is: How many gas stations in the United States?) How many sewer covers in the United States? You let someone work for you for seven days. You want to use A gold bar as a reward. This gold bar will be divided into seven pieces. You must give them a piece after the daily work. If you can only cut this bar twice, how do you divide these workers?