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18 February, 06:41

How many times do the digits of a digital clock add up to 6 in a 12 hour period?

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  1. 18 February, 06:52
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    The short answer is "27" and we have to make a number of assumptions because the question as described enough is vague.

    So let us assume:

    - we are only considering a clock displaying HH:MM where HH is hours and MM is minutes.

    - we start the 12 hour period at 00:00 (midnight).

    - we must add all 4 digits individually. So 11:11 is 1+1+1+1 not 11+11

    - The sum of all 4 digits must equal 6

    01:05

    01:14

    01:23

    01:32

    01:41

    01:50

    02:04

    02:13

    02:22

    02:31

    02:40

    03:03

    03:12

    03:21

    03:30

    04:02

    04:11

    04:20

    05:01

    05:10

    06:00

    11:04

    11:13

    11:22

    11:31

    11:40

    If you start the clock at midday then the options are:

    12:03

    12:12

    12:21

    12:30

    13:02

    13:11

    13:20

    14:01

    14:10

    15:00

    20:04

    20:13

    20:22

    20:31

    20:40

    21:03

    21:12

    21:21

    21:30

    22:02

    22:11

    22:20

    23:01

    23:10
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