| Question | Select the number from among the given options that can replace the question mark (?) in the following series. 4, 11, 31, 65, 193, ? | |
| Type | multiple_choice | |
| Option | 368 | incorrect |
| Option | 398 | incorrect |
| Option | 389 | correct |
| Option | 386 | incorrect |
| Solution | 4 × 2 + 3 = 11 11 × 3 – 2 = 31 31 × 2 + 3 = 65 65 × 3 – 2 = 193 193 × 2 + 3 = 389 4, 11, 31, 65, 193, 389 | |
