No.
36
36 is the only perfect square amongst those listed.
No, 40 is not a perfect square
If by 'perfect number' you mean 'perfect SQUARE', then yes. 49 is an odd number and a perfect square.
It is a square number but not a perfect square number.
No.
1600 (square of 40)
40 is a not perfect square.
the closest whole number's whose square is close to 40 are 6 and 7 with the squares being 36 and 49 respectively. A perfect square doesn't have any decimal parts to it, thus 40 is not a perfect square since root 40 =6.32455....
36
The square root of 1600 is 40. (40x40=1600)
36 is the only perfect square amongst those listed.
Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".
2020^2 = 400400 is a perfect square.......perfect square  noun Mathematics .1.a rational number that is equal to the square of another rational number.2.a polynomial that is the square of another polynomial.Origin:1935-40
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.
The largest perfect square factor of 40 is 4. A perfect square is a number that can be expressed as the product of an integer with itself, such as 4 (2 x 2) or 9 (3 x 3). In the case of 40, the prime factorization is 2 x 2 x 2 x 5. Since the largest perfect square factor must consist of pairs of the same prime factors, the largest perfect square factor of 40 is 2 x 2 = 4.