issb mathematics MCQ #384

15 workers finish in 12 days. 20 workers finish in?

issb mathematics MCQ #384

  1. Question 1

    Q1. 15 workers finish in 12 days. 20 workers finish in?

    • A) 7 days
    • B) 8 days
    • C) 9 days
    • D) 10 days

    Answer: 9 days

    Explanation: Total work 180 worker-days so 180/20 equals 9 days. Work each step carefully; ISSB math rewards accuracy under time pressure.