Multiple choice

Directions: Find the incorrect number in the series given below. 1, 1, 3, 9, 30, 129

  1. 1

  2. 3

  3. 9

  4. 30

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
AI explanation

The series multiplies the previous number by an increasing integer and adds a sequentially decreasing number. The sequence is 1 times 1 plus 0 is 1, 1 times 2 plus 1 is 3, and 3 times 3 plus 2 is 11. Continuing the pattern, 11 times 4 plus 3 equals 47, which means 30 is the incorrect term.

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