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# Is 21 a square number

Updated: 9/16/2023

Wiki User

14y ago

21 is not the square of an integer. The closest square number is 25.

Wiki User

14y ago

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Q: Is 21 a square number
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### Is 21 a square number itself?

No, 21 is not a square number. A square number is the result of multiplying an integer by itself, and 21 cannot be expressed as the square of an integer.

no

### How do you find the square of 21?

To square a number, you multiply it by itself. In this case, 21 x 21 is 441

### What is the sum of the 10th square number and the 14th square number?

sum of 14th square number and 10th square number

### What are the square root of 21?

The square roots of 21 are 4.5826 (rounded) and the negative of the same number.

### What is an Adams number?

If the reverse square root of the reverse of square of a number is the number itself then it is Adam Number. For ex., 12 and 21 Take 12 square of 12 = 144 reverse of square of 12 = 441 square root of the reverse of square of 12 = 21 The reverse square root of the reverse of square of 12 = 12, then number itself. Such number is called Adam Number. cool....................

### Is 21 a perfert square?

Square Number: A number that is a product of some integer with itself. Therefore, 21 is not a perfect square. An example of a perfect square is 16, since 4 times 4 is 16.

### Is the square root of 21 a rational number?

No. The square root of an integer is either an integer, or an irrational number.

### What square number can be taken away from 100 to make 21?

There is no such number.

21

### What is the square root of 84 simplify?

It is: 2 times the square root of 21 and it's an irrational number

### Is the square root of 21 a real number?

Yes, albeit an irrational number