1) Of the three numbers, the first is twice the second and the second is twice the three. The average of the reciprocal of the numbers is 7/72. The numbers are : A) 16, 8, 4 B) 20, 10, 5 C) 24, 12, 6 D) 36, 18, 9 Answer: Option CExplanation:Let the third number be x .Then second number = 2x First number = 4x $\frac{1}{x}+\frac{1}{2x}+\frac{1}{4x}=\frac{7}{72}\times3$$\frac{7}{4x}=\frac{7}{24}$4x=24x=6So the number are 24,12 and 6
