Tough and Tricky questions: Word Problems.
It takes Sarah 25 minutes to do one oil change, and it takes Alice 20 minutes. If Sarah and Alice both begin doing oil changes at exactly 9:00 a.m. without pausing, when is the first time at which they will finish changing the oil of a car simultaneously? Choices:
A) 10:00 a.m. B) 10:12 a.m. C) 10:40 a.m. D) 1:00 p.m. E) 2:00 p.m.
L10:40 a.m.M of 2025   20 = 2 * 2 * 5   25 = 5 * 5   L10:40 a.m.M = 2 * 2 * 5 * 5= 20 = 100 =1 hour 40 minutes   1040AM   10:40 a.m.
<result>C</result>
Tough and Tricky questions: Word Problems.
It takes Sarah 25 minutes to do one oil change, and it takes Alice 20 minutes. If Sarah and Alice both begin doing oil changes at exactly 9:00 a.m. without pausing, when is the first time at which they will finish changing the oil of a car simultaneously?