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：
Learn to Achieve Your Goals with 5 Secrets of Great Bloggers　 What is Cornerstone Content And Why It’s Important　 How to Attract Female Readership For Your Blog　 Double your traffic with White Hat SEO techniques　 Blogging As Therapy: True Life Stories Of Victims And How They C　 3 Reasons to Geek Out on Your Blog　 The Terminal Software Engineer Level　 Facebook Interview Tips and Guidance　 Book Review: Python for Kids, for Dummies　 Find the Least Number Sums of Perfect Squares