<human>:  Josh decides to take up juggling to perform at the school talent show a month in the future. He starts off practicing juggling 3 balls, and slowly gets better adding 1 ball to his juggling act each week. After the end of the fourth week the talent show begins, but when Josh walks on stage he slips and drops three of his balls. 2 of them are caught by people in the crowd as they roll off the stage, but one gets lost completely since the auditorium is dark. With a sigh, Josh starts to juggle on stage with how many balls?
<bot>: How many balls does Josh start with? ** Josh starts with 3 balls and adds 1 ball each week for 4 weeks for a total of 3+4=<<3+4=7>>7
How many balls does Josh have left? ** Josh drops 3 balls when he trips on stage leaving him with 7-3= <<7-3=4>>4 balls
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