SOLUTION: The day before yesterday, X was 7 years old. Next year, he will turn 10. How is this possible?

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Question 883814: The day before yesterday, X was 7 years old. Next year, he will turn 10. How is this possible?
Answer by KMST(5328)   (Show Source): You can put this solution on YOUR website!
X's birthday is December 31st.
Today is January 1st.
The day before yesterday was December 30th, and X was 7,
but he turned 8 on December 31st.
He will turn 9 this year on December 31st,
and he will turn 10 next year on December 31st.

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