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 9 even numbers. His mother immediately worked out the answer. How much had he scored in Math? Options.
A) 80 B) 90 C) 30 D) 70 E) 60

Rationale: "b 90 sum = ( n x n ) + n hence , 9 x 9 = 81 + 9 = 90"
Answer: B