If the quadratic equation ax^2 + bx + c = 0 has roots r1 and r2, which of the following is true?

A. R1 + R2 = -B/A
Posted in:  Quadratic Equations -  Algebra -  Mathematics

In a family, there are three siblings: X, Y, and Z. X is older than Y but younger than Z. If Z is a banker and Y is a teacher, what is X's profession if he is not a teacher or a banker?

B. DOCTOR

Five friends, P, Q, R, S, and T are sitting in a row. P is to the left of Q but not next to R. S is sitting next to T. Who is sitting in the middle?

D. S

Arrange the following words in alphabetical order: Grapes, Orange, Banana, Kiwi.

A. BANANA

  - Which of the following numbers is greater than 10 but less than 20?

A. 15