Question

use the drop-down menus to complete the sentence below.
15 is a number and a of 3.

Explanation:

Step1: Analyze the first blank (type of number)

15 is not a prime number (since it has factors other than 1 and itself, like 3 and 5). It is a composite number (a positive integer that has at least one positive divisor other than one or itself). Also, 15 is an integer, a natural number, but "composite" fits here for the type related to number theory/factorization.

Step2: Analyze the second blank (relation to 3)

To find the relation between 15 and 3, we check if 3 divides 15. Since \( 15 \div 3 = 5 \) (an integer), 15 is a multiple of 3. So the second blank should be "multiple".

Answer:

15 is a \(\boldsymbol{\text{composite}}\) number and a \(\boldsymbol{\text{multiple}}\) of 3.