issb mathematics MCQ #681

A and B together 4 days, A alone 12 days. B alone?

issb mathematics MCQ #681

  1. Question 1

    Q1. A and B together 4 days, A alone 12 days. B alone?

    • A) 5 days
    • B) 6 days
    • C) 7 days
    • D) 8 days

    Answer: 6 days

    Explanation: B rate is 1/4 minus 1/12 equals 1/6 so 6 days. Work each step carefully; ISSB math rewards accuracy under time pressure.