In the Chinese Literature and Mathematics subjects, the results are graded into 3 tiers of either "Excellent," "Pass," or "Fail." Assuming Student A's results are all not lower than Student B's, with at least one subject scoring better than Student B's, then the statement "Student A's results are better than Student B's" is valid. If among some students no one scored better than each other, and neither did any two students score the same points as another, with their Mathematics results also not the same. Then: What is the maximum number of students that fulfill the conditions?
Answers
4. 7 hr. 17 min. 38 sec. - 3 hr. 11 min. 19 sec.
5. 14 hr. 48 min. 17 sec. - 8 hr. 12 min. 29 sec.
6. 28 hr. 36 min. 04 sec. - 19 hr. 18 min. 09 sec.
7. 29 hr. 14 min. 17 sec. - 14 hr. 12 min. 32 sec.
8. 32 hr. 44 min. 23 sec. - 18 hr. 27 min. 44 sec.
9. 48 hr. 19 min. 17 sec. - 24 hr. 19 min. 28 sec.
10. 19 hr. 14 min. 19 sec. - 12 hr. 36 min. 14 sec.
11. 25 hr. 38 min. 16 sec. - 17 hr. 42 min. 23 sec.
12. 24 hr. 42 min. 32 sec. - 16 hr. 51 min. 40 sec.
13. 34 hr. 46 min. 34 sec. - 16 hr. 55 min. 40 sec.
14. 24 hr. 16 min. 19 sec. - 15 hr. 32 min. 58 sec.
15. 46 hr. 34 min. 46 sec. - 25 hr. 46 min. 52 sec.
16. 32 hr. 07 min. 28 sec. - 14 hr. 14 min. 39 sec.
17. 12 hr. 14 min. 17 sec. - 6 hr. 18 min. 23 sec.
18. 23 hr. 17 min. 07 sec. - 16 hr. 32 min. 12 sec.
19. 24 hr. 17 min. 23 sec. - 16 hr. 24 min. 36 sec.
20. 41 hr. 22 min. 19 sec. - 36 hr. 34 min. 58 sec.
21. 44 hr. 45 min. 37 sec. - 26 hr. 55 min. 49 sec.
22. 27 hr. 17 min. 19 sec. - 25 hr. 32 min. 55 sec.
23. 36 hr. 24 min. 16 sec. - 24 hr. 40 min. 50 sec.
24. 42 hr. 17 min. 48 sec. - 13 hr. 12 min. 37 sec.
25. 42 hr. 24 min. 16 sec. - 26 hr. 14 min. 18 sec.
26. 28 hr. 27 min. 47 sec. - 17 hr. 31 min. 32 sec.
27. 21 hr. 27 min. 33 sec. - 14 hr. 28 min. 36 sec.
28. 44 hr. 12 min. 39 sec. - 16 hr. 31 min. 56 sec.
II. Subtract the given time.
(i) 34 minutes 15 seconds from 40 minutes 37 seconds
(ii) 51 minutes 32 seconds from 59 minutes 12 seconds
(iii) 55 minutes 58 seconds from 2 hours
(iv) 17 hours 22 minutes 16 seconds from 20 hours 37 minutes 48 seconds
(v) 4 years 3 months from 9 years 8 months
(vi) 12 years 8 months from 15 years 6 months
(vii) 6 weeks 4 days from 9 weeks 5 days
(viii) 12 weeks 6 days from a year
Answers for the worksheet on subtraction of hours, minutes and seconds are given below.
Answers:
I. 1. 4 hr. 08 min. 11 sec.
2. 2 hr. 09 min. 29 sec.
3. 7 hr. 12 min. 07 sec.
4. 4 hr. 06 min. 19 sec.
5. 6 hr. 35 min. 48 sec.
6. 9 hr. 17 min. 55 sec.
7. 15 hr. 01 min. 45 sec.
8. 14 hr. 16 min. 39 sec.
9. 23 hr. 59 min. 49 sec.
10. 6 hr. 38 min. 05 sec.
11. 7 hr. 55 min. 53 sec.
12. 7 hr. 50 min. 52 sec.
13. 17 hr. 50 min. 54 sec.
14. 8 hr. 43 min. 21 sec.
15. 20 hr. 47 min. 54 sec.
16. 17 hr. 52 min. 49 sec.
17. 5 hr. 55 min. 54 sec.
18. 6 hr. 44 min. 55 sec.
19. 7 hr. 52 min. 47 sec.
20. 4 hr. 47 min. 21 sec.
21. 17 hr. 49 min. 48 sec.
22. 1 hr. 44 min. 24 sec.
23. 11 hr. 43 min. 26 sec.
24. 29 hr. 05 min. 11 sec.
25. 16 hr. 09 min. 58 sec.
26. 10 hr. 56 min. 15 sec.
27. 6 hr. 58 min. 57 sec.
28. 27 hr. 40 min. 43 sec.