The difference in the number of pens that Alice and Clara each have matches their age difference. Alice has 60 pens and Clara has 2/5 times as many pens as Alice. If Alice's age is 20 and Clara is older than Alice, calculate Clara's age in 5 years to come.
If Alice has 60 pens, Clara 2/5*60=<<24=24>>24 pens.
The number of pens that Alice has more than Clara is 60-24=<<60-24=36>>36
Since Alice is 20, and the number of pens that Alice has more than Clara is their age difference, Clara is 20+36=<<20+36=56>>56 years old.
In five years, Clara's age will be 56+5=<<56+5=61>>61 years.
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