完全平方类赛题,一类是题设中出现平方数(式),求与此相关的量;另一类是已知结论是平方数(式),回过头来求解题设中的量.这类题目颇为有趣,求解虽不易,但是对培养思维能力颇为有益. Full square type of competition title, one type is the number of squares (formula) appearing in the title, and the amount related to this; the other is the known number of squares (formula), and the amount to be solved in the title setting This kind of topic is quite interesting, although the solution is not easy, but it is useful for training thinking ability.