
| Question | Select the number from among the given options that can replace the question mark (?) in the following series. 10, 13, 19, 31, ?, 103 | |
| Type | multiple_choice | |
| Option | 55 | correct |
| Option | 61 | incorrect |
| Option | 73 | incorrect |
| Option | 49 | incorrect |
Solution: The logic is:

Hence, ‘55’ is the correct answer.