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Q: Which number is a square number 9,31,123,27?

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6 is a even number but not a square number. Any number that does not have a whole number as its square root is not a square number.

It is a square number but not a perfect square number.

No. A square number is a number that is a square of an integer.

Any even number you square will give you a even square number =)

No but 81 is a square number

6220 is not a square number. The nearest number that is a square number would be 6241. A square number is when all the integers are written down, it could represent a square eg. 4 x 4 meaning that 16 is a square number.

The square root is the number which is times by itself, to get the square number.

If the square root is an integer, it's a square number.

No it is not a square number but it is very close to the square number 121.

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.

Sometimes the square root of a positive number can be irrational, as in the square root of 2 (which is a non-perfect square number), but sometimes it is a rational number, as in the square root of 25 (which is a perfect square number).

The number 2002 is not square. For a number to be square, its square root must be a whole number (nothing to the right of the decimal). The square root of 2002 is 44.74371464...

There is no highest square number. If there was such a number then that number squared would be a higher square number!

if it's square root is an integer, it is a square number.

No. The square root of 249 is not a whole number, therefore it is not a square number.

you can square a negative number but you can not square root a negative number

No, 18 is not a square number

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1896 is not a square number.

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A square number is an integer that is the square of another integer (ie 9 is a square number because it is the square of 3). The square root of 515 is 22.6936...etc , and therefore cannot be a square number

No it is not a square number. It's square root is 18.57 rounded.