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ISEE Middle Level Mathematics Achievement · Question of the Day

ISEE Middle Level Mathematics Achievement Question of the Day

A fresh daily question to build accuracy, reinforce recall, and turn practice into a steady habit.
Tuesday, September 29, 2026

Town A has a population of 12,000 and is growing by 250 people per year. Town B has a population of 15,000 and is decreasing by 150 people per year. Which equation can be used to find y, the number of years it will take for the two towns to have the same population?

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Question of the Day

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Town A has a population of 12,000 and is growing by 250 people per year. Town B has a population of 15,000 and is decreasing by 150 people per year. Which equation can be used to find y, the number of years it will take for the two towns to have the same population?

  1. 12000 + 250y = 15000 - 150y (correct answer)
  2. 12000 + 250y = 15000 + 150y
  3. 250y - 150y = 15000 + 12000
  4. 12000 - 250y = 15000 + 150y

Explanation: The population of Town A after y years will be its initial population plus the growth: 12000 + 250y. The population of Town B after y years will be its initial population minus the decrease: 15000 - 150y. To find when the populations are equal, we set these two expressions equal to each other: 12000 + 250y = 15000 - 150y.