4. Every 24 hours, the clock runs ahead by 3 minutes. They were set accurately. After what shortest time will the clock hands show the exact time again?
4. To make the clock show the exact time, it is necessary for it to run ahead by 12 hours. Let's find out how many minutes are in 12 hours $\operatorname{cax}(12$ hours $=60$ min. $\times 12=720$ min.). Determine the number of days $-720: 3=240$.

Answer: 240 days.