Stack Exchange Network
Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Visit Stack Exchange
Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. It only takes a minute to sign up.
Sign up to join this community
Anybody can ask a question
The best answers are voted up and rise to the top
There are 8 members in a family. Four of them have positive attitudes while the other four have negative attitudes.
Among the group of four who have positive attitudes, the third member is the child of the first and second members while the fourth member is not.
Among the group of four who have negative attitudes, the third member is the child of the first and second members while the fourth member is not.
The third member in the group of positive attitudes motivates himself and receives motivation from other 7 members of the family too.
The fourth member in the group of negative attitudes provides demotivation to other 7 members of the family and demotivates himself as well.
Who are these people?
asked Aug 27, 2022 at 6:30
4,20022 silver badges1818 bronze badges
I think they are
A, B, AB and O, with respective -/+ Rh factors
(1/2) AB has A & B antigens, while O has none
(3) AB+ receives from all and only gives to AB+
(4) O- gives to all, receives only from O-
answered Aug 27, 2022 at 8:29
Lukas RotterLukas Rotter
9,10711 gold badge4444 silver badges8080 bronze badges