数学题：假设有一个池塘，里面有无穷多的水。现有2个空水壶，容积分别为5升和6升。问题是：如何只用这2个水壶从池塘里取得3升的水。

数学题解答：

先装满5升的水壶，然后倒到6升水壶里，再装满5升水壶，再往6升水壶倒满，这样5升水壶就剩下四升水。

然后把6升水壶里的水倒掉，把5升水壶里的四升水倒进6升水壶里，然后再装满5升水壶，再倒入6升水壶。

这样因为6升水壶原先有四升水，现在就只能倒入2升。那5升水壶就只剩下3升水了。

推荐阅读：
C/C++ Program to Compute the Angle Between Hands of a Clock　 What Should Your Anti Virus Software Have in Order to Be Effecti　 The Importance of SEO and How They Improve the Number of Your Cl　 Learn The Basics Of Google My Business　 Iterative and Recursion Algorithms to Compute the Number of Step　 How to Check if a DLL or EXE is 32-bit or 64-bit (x86 or x64) us　 C++: How to Iterate the Elements over the Sets (set, unordered_s　 How to Iterate over the Items in Java’s Map (HashMap, Hash　 Dynamic Programming Algorithm to Count Vowels Permutation　 Exploring the Importance of Brand Consistency