Question
Gwen has thrice the number of pens as Penelope. Irene has five times the number of pens as Gwen. If Irene has 1080 pens, how many pens do the three girls have altogether?
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Gwen has thrice the number of pens as Penelope. Irene has five times the number of pens as Gwen. If Irene has 1080 pens, how many pens do the three girls have altogether?