| Question | Select the number from among the given options that can replace the question mark (?) in the following series. 17, 20, 80, 85, ?, 517 | |
| Type | multiple_choice | |
| Option | 412 | incorrect |
| Option | 213 | incorrect |
| Option | 504 | incorrect |
| Option | 510 | correct |
| Solution | 17, 17 + 3 = 20, 20 × 4 = 80, 80 + 5 = 85, 85 × 6 = 510, 510 + 7 = 517 17, 20, 80, 85, 510, 517. | |
