The problem is underspecified. Digital clocks may run from
(a) 1:00 to 12:59
(b) 01:00 to 12:59
(c) 0:00 to 23:59
(d) 00:00 to 23:59
(e-h) any of the above with seconds appended, :00 to :59.
I agree that not all of these are common, but I have seen some uncommon
ones. For that matter, I've seen ones not on the above list -- the Toronto
subway stations used to contain digital clocks that ran from 0:00 to 12:59
(pm), then from 1:00 (pm) to 11:59 (pm), while a computer that I used to
use had the inverse anomaly -- its time of day command displayed times
from 12:00:00 to 12:59:59 (am), then 01:00:00 to 23:59:59!
I get the following results for the 8 cases.
CASE
AM+PM
HOURS pals/hr TOTAL
OVERALL TOTAL
(a)
yes
1-9
6
54
10-12
1
3
114
(b)
yes
01-05
1
5
06-09
0
0
10-12
1
3
16
(c)
no
0-9
6
60
10-15
1
6
16-19
0
0
20-23
1
4
70
(d)
no
00-05
1
6
06-09
0
0
10-15
1
6
16-19
0
0
20-23
1
4
16
(e)
yes
1-9
60
540
10-12
6
18
1116
(f)
yes
01-05
6
30
06-09
0
0
10-12
6
18
96
(g)
no
0-9
60
600
10-15
6
36
16-19
0
0
20-23
6
24
660
(h)
no
00-05
6
36
06-09
0
0
10-15
6
36
16-19
0
0
20-23
6
24
96
--Mark Brader (msb@sq.com)
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