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David washes his father's car every seven days. Jason washes his mother's car every three days. Both of them washed their cars on October 28. On what date will David and Jason both wash cars again? Make an organized list to solve the problem.

 Jan 23, 2022
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David washes his father's car every seven days. Jason washes his mother's car every three days. Both of them washed their cars on October 28. On what date will David and Jason both wash cars again? Make an organized list to solve the problem.  

 

Date          David          Jason  

 

10/28            x                  x    

10/29  

10/30  

10/31                               x  

11/01  

11/02  

11/03                               x  

11/04            x  

11/05  

11/06                               x  

11/07  

11/08  

11/09                               x  

11/10  

11/11            x  

11/12                               x  

11/13  

11/14  

11/15                               x  

11/16  

11/17  

11/18            x                 x  

 

21 days, to November 18

You could get the number of days by multiplying 3 times 7 but the problem said make a list. 

.

 Jan 23, 2022

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