In this item, we are basically to get the value of the least number that can be divided both by 6 and 7. In other words, we are to get the least common multiple or (LCM). This is obtained by multiplying the 2 numbers. Thus, after 42 days, they will go golfing the same day again.
Since 12.5 is roughly half of the day, no matter what temperature is, it will take you this amount of time. You also need to include the time that you will use to take breaks and eat meals.
