Multiple choice

Choose the correct alternative from the given ones that will complete the series. $30, 24, 19, 15, 12, ?$

  1. 6

  2. 8

  3. 10

  4. 11
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series decreases by a diminishing amount: 30→24 (-6), 24→19 (-5), 19→15 (-4), 15→12 (-3). The subtraction amount decreases by 1 each time. Following this pattern, the next subtraction should be -2, so 12 - 2 = 10. Option C (10) correctly completes this diminishing subtraction series.

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