Question

I am a three digit number. My middle number is double the other two which are square numbers. The number is what?

Answer 1

There's only 4 numbers which fit the first part of the question 
121 
242 
363 
484 

Only the last one 484 has square numbers at the beginning and end (4 is 2 squared). 3 and 2 are not square numbers. 1 is 1 squared, so 121 is sort of right, but 1 doesn't usually count as a square number as it's unique
484 there you go my guy

Answer 2

I think 484 is your answer