issb mathematics MCQ #601

A and B together 6 days, A alone 10 days. B alone?

issb mathematics MCQ #601

  1. Question 1

    Q1. A and B together 6 days, A alone 10 days. B alone?

    • A) 12 days
    • B) 15 days
    • C) 18 days
    • D) 20 days

    Answer: 15 days

    Explanation: B rate is 1/6 minus 1/10 equals 1/15 so 15 days. Work each step carefully; ISSB math rewards accuracy under time pressure.