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.
Step-by-step reasoning process below:
61
If Alice has 60 pens, Clara 2 / 5 * 60 = 24 pens.

The number of pens that Alice has more than Clara is 60 - 24 = 36.

Since Alice is 20, and the number of pens that Alice has more than Clara is their age difference, Clara is 20 + 36 = 56 years old.

In five years, Clara's age will be 56 + 5 = 61 years.

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The final answer: 61