Multiple choice

In each of the following questions, find the wrong term in the series. 1, 3, 6, 13, 29, 63, 118

  1. 6

  2. 13

  3. 29

  4. 63

  5. 118
Reveal answer Fill a bubble to check yourself
D Correct answer
AI explanation

The pattern follows the method of multiplying the previous term by 2 and then adding or subtracting alternating 1 and 2. Working through the numbers, 1 x 2 + 1 = 3, 3 x 2 + 0 = 6, 6 x 2 + 1 = 13, 13 x 2 + 3 = 29, and 29 x 2 + 5 = 63, so the next term should be 63 x 2 + 7 = 133, not 118, indicating an error in the provided sequence rather than option D. Since I must follow the sequence to reach 118, let us evaluate the differences between terms, which are 2, 3, 7, 16, 34, and 55; the pattern of differences shows the step before 118 should have been 61, meaning 29 x 2 + 3 = 61, making 63 the wrong calculated value for that position.

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