IMO Practice Test — Time
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
medium
How many weeks are there in 28 days?
4
3
7
2
Explanation: 28 ÷ 7 = 4 weeks.
Question 2 of 6
hard
Midnight in 24-hour time is written as…
00:00
24:00
12:00
13:00
Explanation: The day starts at 00:00 (midnight).
Question 3 of 6
medium
What is 20:15 in 12-hour time?
8:15 p.m.
8:15 a.m.
10:15 p.m.
2:15 p.m.
Explanation: 20 − 12 = 8, after noon → 8:15 p.m.
Question 4 of 6
hard
A trip takes 1 hour 50 minutes and ends at 4:30 p.m. When did it start?
2:40 p.m.
2:30 p.m.
3:40 p.m.
2:50 p.m.
Explanation: 4:30 − 1 h 50 min = 2:40 p.m.
Question 5 of 6
medium
If today is Friday, what day was it 3 days ago?
Tuesday
Monday
Wednesday
Thursday
Explanation: Friday − 3 = Tuesday.
Question 6 of 6
medium
A class is 45 minutes long and starts at 11:30. When does it end?
12:15
12:00
12:30
11:75
Explanation: 11:30 + 45 min = 12:15.