题目
POW #5:A Cycling Problem
Orville and Wilbur owned a bicycle shop which also sold tricycles.One day,they decided to take an inventory of their stock.They each volunteered to count one item,which would have worked out just fine if one had counted bicycles and the other had counted tricycles.But,Orville and Wilbur were very independent thinkers.Orville counted the number of pedals in the shop and Wilbur counted the number of wheels.
Orville found that they had 144 pedals in the shop,and Wilbur found that they had 186 wheels.All pedals and wheels were actually parts of either bicycles or tricycles.They were just about to start over with their inventory when their friend,Kitty Hawkins,who was a good problem-solver,challenged them to figure out the number of bicycles and tricycles from the inventory they had already done.
Can you help the Wright brothers?
Orville and Wilbur owned a bicycle shop which also sold tricycles.One day,they decided to take an inventory of their stock.They each volunteered to count one item,which would have worked out just fine if one had counted bicycles and the other had counted tricycles.But,Orville and Wilbur were very independent thinkers.Orville counted the number of pedals in the shop and Wilbur counted the number of wheels.
Orville found that they had 144 pedals in the shop,and Wilbur found that they had 186 wheels.All pedals and wheels were actually parts of either bicycles or tricycles.They were just about to start over with their inventory when their friend,Kitty Hawkins,who was a good problem-solver,challenged them to figure out the number of bicycles and tricycles from the inventory they had already done.
Can you help the Wright brothers?
提问时间：2020-07-24
答案
这是一道典型的“鸡兔同笼”问题.分析：每辆自行车有2个轮子,每辆三轮车有3个轮子.一、用算术先确定有多少辆车因为不管自行车还是三轮车每辆车的踏板都是2个,所以三轮车和自行车一共有：144÷2=72(辆)假设法：假设全...
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