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 daughter of Q, what is the relationship of R if P × R + Q = true?

A. R IS THE DAUGHTER OF Q

In the series A, B, C, D, E, F, G, H, I, J, how many letters are vowels?

B. 4

Fire is to Heat as Ice is to ?

A. COLD

Four friends - Alex, Brian, Charlie, and David - have different favorite colors: Red, Blue, Green, and Yellow. Alex does not like Blue or Green. Brian's favorite color is not Red. Charlie likes Green. What is David's favorite color?

D. YELLOW

In a coding system, the word 'HELLO' is coded as 'KHOOR'. What is the code for the word 'WORLD'?

A. ZRUOG