In a family of five members A, B, C, D, and E, A is a doctor, B is a teacher, C is the mother of D, D is a student, and E is the father of A. Who is the teacher?

B. B

A can complete a work in 12 days, and B can complete the same work in 18 days. If they work together, how many days will they take to complete the work?

B. 8 DAYS
Posted in:  Time & Work -  Aptitude -  Mathematics

In a family, there are three children: X, Y, and Z. X is the brother of Y, and Y is the sister of Z. If Z is a boy, who is the only girl in the family?

B. Y

If A can do a piece of work in 15 days and B can do it in 10 days, how long will it take for both A and B to complete the work together?

A. 6 DAYS
Posted in:  Time & Work -  Aptitude -  Mathematics

A family consists of four members: P, Q, R, and S. P is the father of Q, Q is the daughter of R, and S is the son of R. Who is the mother in this family?

C. R