SOLUTION: RIDDLE I am a 4-digit number. I am in the 21st century. The sum of my first and third numbers makes an exact square number Who am I ????

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Question 979613: RIDDLE
I am a 4-digit number.
I am in the 21st
century.
The sum of my first and third numbers makes an exact square number
Who am I ????
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I am a 4-digit number.
I am in the 21st
century.
The sum of my first and third numbers makes an exact square number
Who am I ????
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202x
----
207x
---
x = 0...9