225
One hundred is the least three-digit square number. It is formed by 102.
The first digit has 4 choices for its digit. The second digit has 6 choices and the third has 3. The solution would simply be 4*6*3=72 three digit numbers.
100
999
The greatest three-digit perfect square is 961, which is the square of 31 (31 × 31 = 961). The next perfect square, 1024, is a four-digit number, making 961 the highest perfect square within the three-digit range.
One hundred is the least three-digit square number. It is formed by 102.
The first digit has 4 choices for its digit. The second digit has 6 choices and the third has 3. The solution would simply be 4*6*3=72 three digit numbers.
102 = 100 which is the first possible three digit number that is a perfect square. 312 = 961 which is the last possible three digit number that is a perfect square. So there are 22 three digit positive numbers that are perfect squares.
100
999
The greatest three-digit perfect square is 961, which is the square of 31 (31 × 31 = 961). The next perfect square, 1024, is a four-digit number, making 961 the highest perfect square within the three-digit range.
trangle
121
The smallest 3-digit square number is 100, which is the square of 10 (10 x 10). It is the first perfect square that has three digits.
The smallest three-digit square number is 100, which is (10^2). However, it cannot be expressed as the sum of two squares. The next three-digit square is 121 ((11^2)), which can be expressed as (11^2 = 10^2 + 1^2). Thus, 121 is the smallest three-digit square number that is also the sum of two squares.
729
x64 is not a perfect square any number if it is a 3-digit perfect square and ending with 4 it can be 144,324 ,484 and 784 because the number is ending with 4 but the tens digit is not matching to any of the option so it is not a perfect square