Denise will be 25 years old in two years. Her sister, Diane, is 4 years younger. In how many years will Diane be 25 years old?
Let's be accurate as possible. Think before you answer.
6
Denise is 25 - 2 = 23 years old now.

So, Diane is 23 - 4 = 19 years old now.

Diane will be 25 years old in 25 - 19 = 6 years.

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Final answer: 6