Question

For the set {1,3,5,7,9}, the set builder form of representation is:
{x: x is an odd less than 10}

• A. prime number
• B. natural number
• C. integer

Answer 1

The correct option is B natural number

The given set is {1,3,5,7,9}
These numbers are odd numbers, and they are less than 10.
The numbers aren't all prime, as 9 is composite.
If they're integers, the set would include all the negative numbers as well.
The given set is the set of all odd natural numbers less than 10, which is why the correct answer is "natural numbers".