Multiple choice

The next term of the series 30, 42, 56, 72, \dots is

  1. $84$
  2. $88$
  3. $90$
  4. $92$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Analyze differences: 42-30=12, 56-42=14, 72-56=16. Differences increase by 2 each time: 12, 14, 16, 18. Next term = 72 + 18 = 90. Option C is correct. This is a quadratic series (second difference constant).

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