Yes. The only known almost perfect numbers are the powers of 2. 32 = 2^5 is an almost perfect number. It has not yet been proved whether {x: x = 2^n for n in N} = {x: x is an almost perfect number}.
Yes, nine is a perfect squarebecause 9 = 3*3
Because 9*9 = 81 which is a square number or a perfect square.
A whole number that can be made by multiplying an integer by itself is a perfect square, or square number. An example is 81, which is a perfect square made by 9 x 9.
Because 9 is a perfect square - which means that its square root is an integer. 3 is not a perfect square.
Yes. The only known almost perfect numbers are the powers of 2. 32 = 2^5 is an almost perfect number. It has not yet been proved whether {x: x = 2^n for n in N} = {x: x is an almost perfect number}.
An almost perfect number is a natural number n such that the sum of all divisors of n is equal to 2n - 1.
Yes, nine is a perfect squarebecause 9 = 3*3
81 is a perfect square because 81 = 9 x 9
Because 9*9 = 81 which is a square number or a perfect square.
A perfect square is a rational number that is the square of another rational number. 9, 16, 25, etc., are perfect squares of 3, 4, 5, etc., and X2 + 6X + 9 is a perfect square of (X + 3).
Yes because 9*9 = 81
1 is odd and a perfect square.
Almost Perfect - 1995 The Lost Weekend Part 2 1-9 was released on: USA: 26 November 1995 Germany: April 1998
' 1 ', ' 4 ', and ' 9 ' are perfect squares.
For a number to be a perfect square, the number's square root has to be a whole number. 9 is a perfect square because its square root is a whole number, 3. If the square root of the number is a decimal, then it is not a perfect square. For example, 13 does not divide evenly so it not a perfect square.
A whole number that can be made by multiplying an integer by itself is a perfect square, or square number. An example is 81, which is a perfect square made by 9 x 9.