问题
单项选择题
There are between 100 and 110 cards in a collection of cards. If they are counted out 3 at a tie, there are 2 left over, but if they are counted out 4 at a time, there is 1 left over. How many cards are in the collection ？（）
A.101
B.103
C.106
D.107
E.109
答案
参考答案：A
解析：
该题也即让考生求从100到110之间的数中，被3除余2，被4除余1的数是哪一个。很明显100到110之间被3除余2的数有101，104，107和110，而被4除余1的数有101，105，109，求这两个集合的交集可得此卡片集中应有101张卡片。