What time will it be 4 hours from now? Take the hour on your clock, add four to it, and don't touch the minutes at all. Starting from 10:05 AM lands you at 2:05 PM later that same day.
What time will it be 3 hours from now? Add three hours to the time on your clock and leave the minutes exactly as they are. At 7:25 PM, the answer is 10:25 PM the same day.
What time will it be 2 hours from now? Add two hours to the time on your clock and leave the minutes exactly as they are. At 10:05 AM, the answer is 12:05 PM the same day.
What time will it be 1 hour from now? Add one hour to the time on your clock and leave the minutes exactly as they are. At 4:12 PM, the answer is 5:12 PM the same day.
What time will it be 18 hours from now? Add eighteen hours to the time on your clock, and keep the minutes exactly as they are. At 6:15 AM, the answer is 12:15 AM the next day.
What time will it be 10 hours from now? Add ten hours to the time on your clock and leave the minutes as they are. At 7:10 AM, the answer is 5:10 PM the same day.
What time will it be 8 hours from now? Add eight hours to the time on your clock and leave the minutes exactly as they are. At 7:10 AM, the answer is 3:10 PM the same day.
What time will it be 12 hours from now? Add twelve hours to the time on your clock and the minutes never move. At 9:44 AM, the answer is 9:44 PM the same day.