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81 is a perfect square because 81 = 9 x 9
What else can I help you with?
Why is 81 both a perfect square and a perfect cube?
81 is a perfect squarebecause 81 = 9*9. It is NOT a perfect cube.
What is the largest perfect square factor of 405?
81 is the only one.
Is the root of 81 an irrational number?
No. The square root of 81 is 9, which is a rational number.
Is 80 a perfect square number?
No, 80 is a not perfect square.
A perfect square is a number that has an integer square root?
Yes, a perfect square is a number that has an integer square root.
Is 81 a perfect square?
81 is a perfect square
What is the the next square number after 81?
The next perfect square after 81 (92) is 100 (102).
What kind of a number is 81?
81 is; Natural number, Perfect-square number, Perfect 4th root number, Perfect totient number, Odd Number, Composite Number, etc.
How is a sudoku puzzle a perfect square?
Because 9*9 = 81 which is a square number or a perfect square.
Is the number 81 a perfect square?
Yes because 9*9 = 81
What is a perfect square between the numbers 70-85?
155
What is the next square number after 78?
The next perfect square after 78 is 81 (±92).
Why is 81 both a perfect square and a perfect cube?
81 is a perfect squarebecause 81 = 9*9. It is NOT a perfect cube.
What is the perfect square of 9?
The perfect square of 9 is 81.
What is an example of an odd number that is a perfect square?
25, 49, 81, 225
What has to do with 81?
81 is a perfect square. 9 x 9 = 81
Is 70 a square number?
No, at least, 70 isn't a perfect square. The nearest perfect squares are 8 squared = 64, and 9 squared = 81.
