Q: If the average of the first four of five numbers in decreasing order is 25 and the average of the last four numbers is 20, then what is the difference between the first and the last number?
(a)5
(b)10
(c)15
(d)20
Correct Answer: (d)
The correct answer is (d) '20'. This question from the General Studies domain tests knowledge of Miscellaneous.