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题库 / OG2017Q-DS-201
A certain dealership has a number of cars to be sold by its salespeople. How many cars are to be sold?
(1) If each of the salespeople sells 4 of the cars, 23 cars will remain unsold.
(2) If each of the salespeople sells 6 of the cars, 5 cars will remain unsold.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
题目分析：
（1） 条件1有多少个销售人员，也就无法得到销售的车辆数，无法解题。
（2） 条件2同理，也无法单独解题。
结合条件1和条件2，设有x个销售人员，汽车总数一定，有4x+23=6x+5，解得x=9，所以出售的车辆数为4*9+23=59辆。
因此，本题答案为（C），两个条件结合起来才能解题，任何单独一个均不行。
本题不是求通项式，想多了。
糊涂了，把它当成韩信点兵法了