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24 June, 04:14

Jack plays on a basketball team after school every third day of the month. He babysits his younger brother after school every seventh day of the month. How many times during a 30 day mark if any will jack have a conflict between basketball and babysitting? Explain

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  1. 24 June, 05:23
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    Jack will have exactly 1 conflict per month. An easy way to do this is to visualize what he has to do each month.

    Basketball:

    3, 6, 9, 12, 15, 18, 21, 24, 27, 30

    Babysits:

    7, 14, 21, 28

    Looking above, you can see that only one number is the same, which means there is only one conflict in a 30 day period.
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