5 : 122 : : 6 : ?

| Question | 5 : 122 : : 6 : ? | |
| Type | multiple_choice | |
| Option | 213 | correct |
| Option | 221 | incorrect |
| Option | 112 | incorrect |
| Option | 332 | incorrect |
| Solution | the digit sum is 1+2+2=5, so 1+2+3=6 | |

| Question | 5 : 122 : : 6 : ? | |
| Type | multiple_choice | |
| Option | 213 | correct |
| Option | 221 | incorrect |
| Option | 112 | incorrect |
| Option | 332 | incorrect |
| Solution | the digit sum is 1+2+2=5, so 1+2+3=6 | |