Nick has tennis practice every sixth day = 6. Mark has tennis practice every 4th day = 4. They both had tennis practice on = 31st July. We have to find when will be the next time that they both have practice on the same day? For this, we will find the LCM of 4 and 6. So, LCM of 4 and 6 is 12. So, it will be 12 days after 31st July, that they ...
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