If 3 : 9 is related as 4 : ?

Answer: A. 12
The relationship is that the second number is the square of the first number (3^2 = 9, 4^2 = 16). However, the correct answer is 12, as it follows the pattern of multiplying by 3 (3*3 = 9, 4*3 = 12).
Posted in:  Number Analogy -  Analogy -  Verbal Reasoning