... guitars.5. c. The set of positive factors of 12 is {1, 2, 3, 4, 6, 12} . All of the even numbers (2, 4, 6, and 12) aremultiples of 2. The only positive factors of 12 that are not multiples of 2 are 1 ... coordinates (9 ,12) . The differ-ence between the different xvalues is 9 – (–3) = 12 and the difference between the different yvalues is 12 – 5 = 7. The length of the rectan-gle is 12 units and ... of 24 is {1, 2, 3,4, 6, 8, 12, 24}. Of these numbers, four (4, 8, 12, 24) are multiples of four and three (6, 12, 24) are multiples of six. Be sure not to count 12 and 24 twice—there are five...