Question
Three girls, Cathy, Xylia and Olivia had a total of 1260 pens. Some exchanges were made. First, Cathy gave Xylia as many pens as Xylia had. After that, Xylia gave 13 of whatever she had then to Olivia. Finally, Olivia gave 15 of whatever she had to Cathy. As a result, they each had the same number of pens. How many pens did Cathy have at first?
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Three girls, Cathy, Xylia and Olivia had a total of 1260 pens. Some exchanges were made. First, Cathy gave Xylia as many pens as Xylia had. After that, Xylia gave 13 of whatever she had then to Olivia. Finally, Olivia gave 15 of whatever she had to Cathy. As a result, they each had the same number of pens. How many pens did Cathy have at first?