Question 13
A digital clock displays 20:07. What is the shortest elapsed time before it again displays a time using those four digits?
Editorial note: the correct wait is absent from the original options. Find the next valid display and explain the discrepancy. Manual scoring.

Original source options (retained):
(A) 4 hours 2 minutes; (B) 6 hours; (C) 10 hours 55 minutes; (D) 11 hours 13 minutes; (E) 24 hours
Editorial format note: this essay examines the source wording and its assumptions. The original choices are retained for comparison.
Editorial note: the correct wait is absent from the original options. Find the next valid display and explain the discrepancy. Manual scoring.

Original source options (retained):
(A) 4 hours 2 minutes; (B) 6 hours; (C) 10 hours 55 minutes; (D) 11 hours 13 minutes; (E) 24 hours
Editorial format note: this essay examines the source wording and its assumptions. The original choices are retained for comparison.