Tim came second in Math. When his mother asked him how much he had scored, he answered that he got the sum of the first 12 even numbers. His mother immediately worked out the answer. How much had he scored in Math?
Choose one.
A) 156 B) 146 C) 158 D) 187 E) 160

Rationale: "a 156 sum = ( n x n ) + n hence , 12 x 12 = 144 + 12 = 156"
Answer: A