A number exceeds 20% of itself by 40. The number is ? Choices:
A) 50
B) 60
C) 80
D) 320
E) none

Rationale: answer ∵ a - 20 % of a = 40 ⇒ a - a / 5 = 40 ⇒ 4 a / 5 = 40 ∴ a = ( 5 x 40 ) / 4 = 50 . correct option : a
Answer: A