In the code, if P - Q means P is the father of Q, P + Q means P is the son of Q, and P ÷ Q means P is the sister of Q, what is the relation of R if P - Q ÷ R?
If P - Q means P is the sister of Q, P + R means P is the mother of R, and R × S means R is the daughter of S, what is the relationship of Q to S in the expression P - Q + R × S?
In a group of five friends: A, B, C, D, and E, the following conditions apply: A is taller than B but shorter than C. D is shorter than E but taller than A. Who is the tallest among them?
B is ranked 5th from the bottom in a group of 25 people. If B swaps places with the person ranked 10th from the top, what will be B's new rank from the top?