Multiple choice

Find the missing number in the series $18, 24, 36, 56, 86, ?$

  1. $128$
  2. $256$
  3. $156$
  4. $144$
  5. $196$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pattern is: add the difference between consecutive terms multiplied by increasing increments. 24-18=6, 36-24=12, 56-36=20, 86-56=30. The differences are 6, 12, 20, 30 (adding 6, 8, 10). Next difference should be 30+12=42, so 86+42=128. Option A (128) correctly continues this pattern.

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