A seminar starts at 2:50 p.m. and lasts 1 hour and 25 minutes. When does it end?
Correct answer: C. 4:15 p.m.
Add 1 hour: 3:50 p.m. Then add 25 minutes: 10 minutes takes you to 4:00, and the remaining 15 minutes give 4:15 p.m. There is no such time as 3:75.
easy