### Category: Fluid Reasoning

### Difficulty: Medium

### Result: Wrong

## 6. Which one of the numbers does not belong in the following series?

2 - 3 - 6 - 7 - 8 - 14 - 15 - 30

- THREE
- SEVEN
- EIGHT◀ Correct Answer
- FIFTEEN
- THIRTY

Your Answer: No Answer Given

This question tests your fluid reasoning ability by requiring you to identify the pattern governing a numerical series and to recognize anomalies within it. The series is as follows: 2, 3, 6, 7, **8**, 14, 15, 30. Observing the sequence, we can detect a pattern where the operations alternate between addition and multiplication. Starting with 2:

- 2
*plus*1 equals 3 (2 + 1 = 3). - 3
*multiplied by*2 equals 6 (3 * 2 = 6). - 6
*plus*1 equals 7 (6 + 1 = 7). - 7
*multiplied by*2 equals 14 (7 * 2 = 14). - 14
*plus*1 equals 15 (14 + 1 = 15). - 15
*multiplied by*2 equals 30 (15 * 2 = 30).

According to this pattern, after 6 + 1 = 7, the next operation should be multiplication by 2, resulting in 7 * 2 = 14. However, the number **8** appears in the series instead of 14, disrupting the established pattern. Therefore, the number that does not belong in the series is **8**.