Problem:
A bakery owner turns on his doughnut machine at Am. At Am the machine has completed one third of the day's job. At what time will the doughnut machine complete the job?
Answer Choices:
A. PM
B. PM
C. PM
D. PM
E. PM
Solution:
The machine worked for hours and minutes, or minutes, to complete one third of the job, so the entire job will take minutes, or hours. Hence the doughnut machine will complete the job at .
The problems on this page are the property of the MAA's American Mathematics Competitions