Identify the missing letter in the series: Z, X, V, T, ?

D. P

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

C. GREEN

Find the missing number in the series: 5, 10, 20, 40, ?

C. 80

Z, X, V, T, ?

C. Q

If '+' represents addition, '-' represents subtraction, '×' represents multiplication, and '÷' represents division, what is the value of 8 ÷ 2 + 3 × 4?

B. 20