Digital Bathroom Clock
Posted in Digital Auction on 08/26/2008 07:56 pm by admin
Word problem (the digital clock and the mirror) Help, please?
When I look in the mirror in the bathroom while I shave, I can see the reflection of the digital clock in my bedroom. Sometimes the time that I see in the mirror (a reflection of real time) is the same as real time. How many times does this happen each day? (Ignore the two points because I can not see it anyway – the clock is too far.) Thanks for showing / explaining each step! Thanks!
0 changes to 0 1 changes to 1 2 changes 5 5 changes to 2 8 changes to 8 if the time is a digit (between 1 and 9), then: "The middle finger should be its own reversal. Only 3 numbers have this property, ie 0, 1, and 8. However, 8 can not be the means of two digits, as there are only 60 minutes in an hour. So we have 2 possibilities are valid for between two dígitos. "Besides, the last digit must be a reversal of the first. Only 4 numbers between 1 and 9 have this property (1, 2, 5, 
.- Therefore, we have 2 * 4 = 8. (1:01, 1:11, 2:05, 2:15, 5: 02, 5:12, 8:08, 8:18) If the time is 10, then the minutes should be 01 (10:01) If the time is 11, the minutes shall be 11 (11:11) If the hour is 12, then the record will be 51 (12:51) 8 +3 = 11
LED-45 “Light House”
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