Sum & Difference of Ages

December 11, 2025

Problem

Lisa is 16 years younger than Kathy. If the sum of their ages is 30, how old is Lisa? (Sum of ages and age difference problem)

Explanation

Visualize the classic age word problem: Lisa is 16 years younger than Kathy, and together their ages sum to 30. Adjust the sliders to see how the ages relate and where the correct solution lies.

Interactive Visualization

Parameters

Sum of Ages (Lisa + Kathy)30.00

Age Difference (Kathy − Lisa)16.00

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