Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 Write 3:00 pm in 24-hour time. (type like 1500)
Show worked solution
3 + 12 = 15, so 3:00 pm is 1500.
2 Write 0730 in am/pm time. (type like 7:30am)
Show worked solution
0730 is 7:30 am.
3 Write 9:00 am in 24-hour time. (type like 0900)
Show worked solution
9:00 am is 0900.
Level 2 · Core
4 Write 11:45 pm in 24-hour time. (type like 2345)
Show worked solution
11 + 12 = 23, so 11:45 pm is 2345.
5 Write 1620 in am/pm time. (type like 4:20pm)
Show worked solution
16 − 12 = 4, so 1620 is 4:20 pm.
6 Write 12:30 am in 24-hour time. (type like 0030)
Show worked solution
12:30 am is half an hour after midnight: 0030.
Level 3 · Challenge
7 A train leaves at 1345 and the journey takes 2 hours 40 minutes. What time does it arrive, in 24-hour time? (type like 1625)
Show worked solution
1345 + 2 h = 1545, then + 40 min: 15 min reaches 1600, and 25 more gives 1625.
8 A film starts at 1915 and finishes at 2105. How long is it? (type like 1h50m)
Show worked solution
1915 to 2000 is 45 min, then 2000 to 2105 is 1 h 5 min. Altogether 1 h 50 min.
9 A shop closes at 1730. It is now 1455. How many minutes until closing?
Show worked solution
1455 to 1730 is 2 h 35 min. In minutes: 2 × 60 + 35 = 155 minutes.