Q: Is 20 a square number or not?

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20 is a not perfect square.

The square root of 20 is: ± 4.472136The square root of 20 is ± 4.472136 (to 7 sf).A square root of a number is the number that when multiplied by itself equals the given number.

20 is not the square of an integer, the square root of 20 is approximately equal to 4.472.

Well, a square number is the answer to a number multiplied by itself. So, what you'd have to do is multiply 20*20, and the answer is 400.

The square root of 20 is an irrational number

If you mean the square root is 20, the answer is 400. If you mean the square root of 20, the answer is about 4.47.

20 is a not perfect square.

The only square number of an integer between 20 and 30 is 25, which is equal to the square of Â±5.

20*20 = 400

16 is an even number from 10 to 20, and its square roots are -4 and +4.

It is: 4+16 = 20

400 is a significant number because it is a square number as 20*20 = 400

Yes.... look at the number 20. It's a composite and it does have a square root.

The only square number between 20 and 30 is 25.

The square of 11-20 is the square of -9. To actually calculate the square, multiply -9 by itself.

16 is the only square number.

36 is the only square number that is also a triangular number between 20 and 40.

No.

20

25 is a perfect square occurring between 20 and 30.

because there is no whole number when multiplied by itself that gives 20. 25 is a square number because 5 x 5 = 25

The square root of 20 is an irrational number that can be expressed as 2 times square root of 5

21

Yes. 400 is the product of 20 x 20.

There are (not counting 1) three square numbers between 1 and 20.