Multiple choice Directions: Complete the following number series. 15, 60, 420, 4200, 54600, ? 764400 819000 873600 709800 928200 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The pattern of the given number series is 15 x (7 - 3), 60 x (9 - 2), 420 x (11 - 1), 4200 x (13 - 0) = 54600 and so on. So, the next term is 54600 x [(15 - (-1)] = 873600.