英语好的数学帝进

The Lemming Society has unusual membership qualifications. New members can only be introduced at an Annual General Meeting (AGM) and to be allowed to continue one's membership for the next year a current member must attend the AGM. However, to be allowed to attend the AGM a current member must bring along one new member to be introduced into the Society at the meeting.

Last year the Society had 240 members. This year it has 380 members.

How many new members were introduced at the last AGM?

要参加AGM,一个老成员必须带一个新成员来

今年有成员380个,去年有240个

新成员就有380-240=140个

选D

D。。。卖关子那么多。。其实就是用今年的成员-去年的成员380-240=140

主要意思是说Lemming Society 里面，新会员必须在年会里面被引荐才能加入这个社团，并且，如果一个会员要保持下一年的会员资格，他必须参加这个年会。然而，要参加年会的老会员，必须带一个新会员到这个社团里面，才能参加年会。

很绕。。。

不过答案很简答啊。就是380-240=140