Variant 2.

Currently, mom is 23 years and 8 months old, and her daughter is 9 months old. In how many months will the number of years in mom's age be equal to the number of months in her daughter's age?
Answer: 16.

Option 3.

Currently, the mother is 19 years and 4 months old, and her daughter is 1 month old. After how many months will the number of years in the mother's age be equal to the number of months in the daughter's age?

Answer: 20.