Question

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 63, then difference of first and third numbers is:

• A. 27
• B. 54
• C. 108
• D. 90

Answer 1

Answer:

B. 54

Let the second number be x first number = 2x third number = 4x (2x + x +4x)/3 = 63 ⇒ 7x =189 ⇒ x = 27 Thus, the numbers are 54, 27 and 108 The difference of first and third number = 108 – 54 = 54