Are all odd numbers prime in math?

Answer 1

Do you mean are all prime numbers odd numbers?
There is a major difference n those two questions.
To answer it the way you put it, no, not all odd numbers are prime numbers, 21 for example is divisible by 1,3,7 and 21.
To answer it the way I put it, no, all prime numbers are odd numbers except the number 2, otherwise they would be divisible by themselves, by the number one and the number 2.

Answer 2

Do you mean are all prime numbers odd numbers?
There is a major difference n those two questions.
To answer it the way you put it, no, not all odd numbers are prime numbers, 21 for example is divisible by 1,3,7 and 21.
To answer it the way I put it, no, all prime numbers are odd numbers except the number 2, otherwise they would be divisible by themselves, by the number one and the number 2.

Answer 3

No. The number 81 is odd but is divisible by 1 3 9 and 27 and the number 51 is divisible by 1 3 and 17, as two examples