@Gosleepriya The answer is 71 because the man enters the room with 100 people which makes it 101 then a 40 leave that makes it 61 and then 10 more come in which makes it 71
@Gosleepriya The answer is 12. He has 11 sons and each one has one sister which meaning he has one daughter so each brother has the same sister, which is one daughter