issb mathematics MCQ #284

Next: 1, 3, 6, 10, 15, ?

issb mathematics MCQ #284

  1. Question 1

    Q1. Next: 1, 3, 6, 10, 15, ?

    • A) 20
    • B) 21
    • C) 22
    • D) 24

    Answer: 21

    Explanation: Differences are 2, 3, 4, 5, so next is 6. 15 plus 6 equals 21.