many times.
146
146
The number 5 will appear 146 times in 24 hours.
There are four digits on a digital clock. A seven will never appear in two of them. It will appear 6 times per hour (07, 17, 27, 37, 47, 57) and once each at 7 am and 7 pm, or 700 and 1700 if you're keeping military time. My best guess: 24 x 6 + 2 = 144
once
In a digital clock, the hours range from 00:00 to 23:59, totaling 24 hours. Each hour has two digits, so there are 48 total digits displayed in a day. Since the digit 7 can appear in each of these 48 digits, it can potentially appear up to 48 times in a digital clock in 24 hours.
120 times
5 times
There are 93 such events.
An hour has 60 min. Assuming the clock has only the hour and minute displayed, every hour 1 would appear at 1, 11,12,13,14,15,16,17,18,19,10,21,31,41,51. Counting 11 as once there are 15 1s in an hour. In the 24 hours, only 0,2,3,4,5,6,7,8,9,22,23 have no 1 s in them. Therefore 1 aooears 165 times in those times. As for hours 1,10,11,12,13,14,15,16,17,18,19,21, there is always a 1 in the clock. This makes 1 appear 12*60 times which is 720 times. Therefore in total, 1 appears 885 times in a digital 24 hour clock.
386 times