Question
Three girls, Nicole, Julie and Kylie had a total of 3600 pens. Some exchanges were made. First, Nicole gave Julie as many pens as Julie had. After that, Julie gave 15 of whatever she had then to Kylie. Finally, Kylie gave 15 of whatever she had to Nicole. As a result, they each had the same number of pens. How many pens did Nicole have at first?
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Three girls, Nicole, Julie and Kylie had a total of 3600 pens. Some exchanges were made. First, Nicole gave Julie as many pens as Julie had. After that, Julie gave 15 of whatever she had then to Kylie. Finally, Kylie gave 15 of whatever she had to Nicole. As a result, they each had the same number of pens. How many pens did Nicole have at first?