It isn't clear what you mean by "underroot"; I am not aware of a mathematical function by that name.
Yes.
Yes. It's 4, and 4 is a natural number.
No, it is not. A natural number is a positive integer.3*3 = 9 and 4*4 = 16 and there is no natural number between 3 and 4. Therefore there is no natural number which, when squared, will give 13.
Yes and it is 4
It isn't clear what you mean by "underroot"; I am not aware of a mathematical function by that name.
Yes.
Yes. It's 4, and 4 is a natural number.
No, it is not. A natural number is a positive integer.3*3 = 9 and 4*4 = 16 and there is no natural number between 3 and 4. Therefore there is no natural number which, when squared, will give 13.
Yes and it is 4
21
It is a natural number, an integer, a perfect square, a perfect fourth power, a rational number, a real number, ... and so on.
It is rational, whole, integer and real but not natural nor irrational.
x = 12, 14, 16, & 18
In natural language, the number of characters comprising the word. In IT the number of bits in the architecture of the processor registers - 8, 16, 32, 64 etc.
2, 4, 6, 8, 10, 12, 14, 16, 18 . . . to infinity.
no..a natural number is a whole number