A box contains red, blue, and green balls. If the number of red balls is twice the number of blue balls and the number of green balls is three times the number of blue balls, which color has the highest quantity?
From the following items: 1) A, 2) B, 3) C, 4) D, 5) E, the selection rules are: A cannot be selected if C is selected. B must be included if D is included. E can only be included if A is not included. Which of the following selections is valid?
In a group of five friends: A, B, C, D, and E, A is taller than B but shorter than C. D is shorter than E but taller than A. Who is the tallest among them?
In a group of five friends: A, B, C, D, and E, the following conditions are given: A is taller than B but shorter than C. D is shorter than E but taller than A. Who is the tallest among them?