| Question | Select the number from among the given options that can replace the question mark (?) in the following series. 2, 31, 4, 37, 10, 41, 28, 43, 82, 47, ? | |
| Type | multiple_choice | |
| Option | 422 | incorrect |
| Option | 242 | incorrect |
| Option | 224 | incorrect |
| Option | 244 | correct |
| Solution | The logic followed here is: Numbers at odd position: 2, 4, 10, 28, 82, ? 2 × 3 – 2 = 6 – 2 = 4 4 × 3 – 2 = 12 – 2 = 10 10 × 3 – 2 = 30 – 2 = 28 28 × 3 – 2 = 84 – 2 = 82 82 × 3 – 2 = 246 – 2 = 244 Numbers at even position: 31, 37, 41, 43, 47 → Prime number series | |
