Answer:
42 days
Explanation:
To solve this problem one must find the Least Common Multiple (LCM) between the days it takes for both Sherman and Brad to go golfing (6 and 7)
Since 7 is a prime number the LCM, in this case, is the product of 7 by the other number:
![LCM(6,7) = 6*7\\LCM(6,7) = 42](https://img.qammunity.org/2020/formulas/mathematics/high-school/xgjhnz1vkbea7sy1u9ys4kwtwxb7illwr5.png)
It will be 42 days until Sherman and Brad will go golfing on the same day again.