issb mathematics MCQ #684

A in 9 days, B in 18 days together?

issb mathematics MCQ #684

  1. Question 1

    Q1. A in 9 days, B in 18 days together?

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

    Answer: 6 days

    Explanation: Rates 1/9 plus 1/18 equals 1/6 so together 6 days. Work each step carefully; ISSB math rewards accuracy under time pressure.