Question:
A was born in 1955. B was born in 1966.
How old is B when A is 68 years old?
How many ways to calculate to get B's age when A is 68?
Answer 1:
1966 - 1955 = 11. (B is younger than A by 11 years)
68 - 11 = 57. (A is 57 years old when B is 68 years)
Answer 2:
1955 + 68 = 2023. (It's in the year of 2023 when B is 68 years old)
2023 - 1966 = 57. (B is 57 years old)
