Question
Three girls, Kathy, Tiffany and Barbara had a total of 2820 stickers. Some exchanges were made. First, Kathy gave Tiffany as many stickers as Tiffany had. After that, Tiffany gave 13 of whatever she had then to Barbara. Finally, Barbara gave 13 of whatever she had to Kathy. As a result, they each had the same number of stickers. How many stickers did Kathy have at first?
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Three girls, Kathy, Tiffany and Barbara had a total of 2820 stickers. Some exchanges were made. First, Kathy gave Tiffany as many stickers as Tiffany had. After that, Tiffany gave 13 of whatever she had then to Barbara. Finally, Barbara gave 13 of whatever she had to Kathy. As a result, they each had the same number of stickers. How many stickers did Kathy have at first?