两棵树上共有麻雀24只，第一棵树飞到第二棵树上5只，又从第二棵树上飞走7只到第一棵树，这时第一棵树上的麻雀的只数是第二棵的2倍。原来每棵树上各有几只？

本来题目中鸟是25只，可惜这是一道错题，只好把25改成24了。解答如下：

24÷（1+2）＝8（只）……第二棵现在

8×2＝16（只）……第一棵现在

8+7-5＝10（只）……第二棵原来

16-7+5＝14（只）……第一棵原来

推荐阅读：
Top 6 Things to Keep in Mind While Sending Bulk Emails　 7 Tweaks to Amplify Your Landing Page’s Conversion Rate　 Fresh Ideas to Make Money Via Your Blog　 4 Tips for Earning the Best Quality Backlinks　 Lombok Code Template Tutorial: You Probably Don’t Need to 　 5 Easy-to-Use SEO Tools and Their Uses　 The Difference Between Java Map’s compute, computeIfAbsent　 How to Fix a Slow/Incorrect Clock on Windows?　 How to Put Current Running Program in Background without Being T　 How to Break a Palindrome String by Replacing a Character?