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| Q. |
What number should come next in the series? 2, 6, 12, 20 |
| A. | 30 |
| B. | 32 |
| C. | 34 |
| D. | 36 |
| Answer» A. 30 | |
| Explanation: This is a series where each number is two times the corresponding triangular number. So the next number should be $$2 * 6 * (6 + 1) / 2 = 30$$. | |
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