![]() If the square root is not a whole number, then the given number is not a perfect square. If the square root is a whole number, then it is a perfect square. ![]() Another Way to Identify Perfect SquaresĪnother way to check whether a number is a perfect square or not is by calculating the square root of the given number. ![]() 400 and 300 both have an even number of zeros at the end, but 400 = 20 2, which is a perfect square, but 300 is not a square of any whole number. If there are an even number of zeros, then it might be a perfect square. If there is an odd number of zeros, then it's definitely not a perfect square. If the number ends with the digit 0, then you may look for the following: How many zeros are there at the end of the number? Let's say we have a number 1000. The numbers 159 and 169 both end with the digit 9 but 169 is a perfect square, whereas 159 is not. Let us look at a few deviations from the above-defined rules of a perfect square number.
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