一个班去植树，总共植树222棵，已知老师和每个同学植树一样多，同学正好站三个纵队，问每个同学植树多少棵，这个班有多少个同学？

数学题解答：此题看似条件不足，其实是可以解答的。我们理解为一名老师带队。把植树总棵数分解质因数：222＝3×2×37＝6×37

可以看出符合生活实际的总人数是37人，每人植树6棵。去掉一名老师后，还有36名同学，正好是3的倍数，可以列成3路纵队。

推荐阅读：
2020 Design Trends [Infographic]　 8 Content Marketing Plugins You Need For Your WordPress Blog　 Tips to Make Money from the Comfort of Your Own Home　 5 Tips for Protecting Your Freelance Business from Liabilities　 5 Easy Ways On How To Build An Authority Website　 How to Protect Your WordPress Site From Hackers　 Top 10 Relationship Blogs With the Best Pieces of Advice in 2020　 How to Construct Binary Search Tree from Preorder Traversal in P　 Dynamic Programming Algorithm to Compute the Block Sum in a Matr　 Smallest Multiple Algorithm using Bruteforce or GCD/LCM