Square numbers of integers falling between 50 and 90 are:
82 = 64
92 = 81
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90
The number is 90.
81; because 92 is 81.
fd 50 rt 90 fd 50 rt 90 fd 50 rt 90 fd 50
No, 90 is not a square number. 81 is 9 squared and 100 is 10 squared.