Use your brain (1)your are a farmer.your have four cows.But one day a cow is missing.Rearrange the
three cows have equal space.Can you make three squares?All the matches must be used.
(2)then anothches cow is missing.Can you make tow squares?All the matches must be used.
第二个应怎么摆?第一个就不用说了.望众人指教,