The square is either 25 or 16.
Number puzzles have specific set of rules, you first has to figure out the pattern being followed and then answer the puzzle according to the pattern.
According to question,
the sum of two digits must be 7.
Take some instances,
where 16 is a square of 4.
where 25 is square of 5.
where either 34 or 43 both are not the perfect square of any number.
The possibilities of a number can be either 16 or 25.
Learn more about number puzzle here:
https://brainly.com/question/18234836
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