Question

Marcy is taking two types of medicine. She takes one medicine every 6 hours. She takes the other medicine every 4 hours. She takes both medicines at 9am. At what time will Marcy take both medicines together again?

Answer 1

At 9:00 P.M.

Explanation:

Marcy is taking two types of medicine.

One medicine every 6 hours and other medicine every 4 hours.

She takes both medicines at 9 a.m. now we have to calculate the time at which Marcy take both medicines together again.

We will calculate Lowest common multiple (LCM) of 6 and 4.

LCM of 6, 4 = 2 × 2 × 3 = 12

After 12 hours 9 A.M. = 9 P.M.

After 12 hours at 9 P.M. she will take both medicines together again.

Answer 2

The answer is 9 pm
6 hour x 2 is 12 hours
4 hours x 3 is 12 hours
9 am +12 hours is 9pm