General Intelligence · Analogy

Two sets of numbers are given below. In each set, a certain mathematical operation on the first number results in the second number, the second results in the third, and the third results in the fourth. Which of the given options follows the same pattern? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits.)7 - 21 - 42 - 142 ; 11 - 33 - 66 - 166