Question

Which of the following is the set of natural numbers, which are less than 15 and divisible by 3 in roster form?

• A. $\{1,3,5,12,15\}$
• B. $\{3,6,9,12,15\}$
• C. $\{3,6,9,12\}$
• D. $\{1,2,6,9,12\}$

Answer 1

The correct option is C $\{3,6,9,12\}$

3, 6, 9, and 12 are the natural numbers that are less than 15 and are divisible by 3.
In roster form, the elements of a set are listed within a pair of braces and they are separated by commas.
Thus, the set of natural numbers less than 15 and divisible by 3 in roster form is given by $\{3,6,9,12\}$.