issb mathematics MCQ #381

Average of 6 numbers is 15. Sum?

issb mathematics MCQ #381

  1. Question 1

    Q1. Average of 6 numbers is 15. Sum?

    • A) 75
    • B) 80
    • C) 90
    • D) 100

    Answer: 90

    Explanation: Sum equals average times count so 15 times 6 is 90. Work each step carefully; ISSB math rewards accuracy under time pressure.