Yes
Yes, 15 is a natural number. Natural numbers are the set of positive integers starting from 1 and increasing by increments of 1 (1, 2, 3, 4, 5, ...). Since 15 is a positive integer and can be reached by counting up from 1, it is considered a natural number.
Yes, 19 is a natural number
Yes, every natural number is a whole number.
It is both.
Yes, it is a natural number.
yes, 3 is a natural number. any positive number is.
√225 = 15 so it is a natural number.
Yes it is considered as a natural number.
YES. 101 is a natural number.
Yes it is considered as a natural number.
It is a natural number.
No a natural number is 1,2,3,4 etc