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 8 even numbers. His mother immediately worked out the answer. How much had he scored in Math? Options.
A) 80	B) 90	C) 30	D) 72	E) 60

Rationale: d 72 sum = ( n x n ) + n hence , 8 x 8 = 64 + 8 = 72
Answer: D