issb intelligence MCQ #399

Next number: 5, 6, 8, 11, 15, ?

issb intelligence MCQ #399

  1. Question 1

    Q1. Next number: 5, 6, 8, 11, 15, ?

    • A) 18
    • B) 19
    • C) 20
    • D) 21

    Answer: 20

    Explanation: Add 1,2,3,4,5 so next is 20. Work each step carefully; ISSB math rewards accuracy under time pressure.