11.9 #2-10,17,19,31,33
12.1 #1,9,11,15,,17,19,23-26,27,31
12.2 #1,3,5,7,15,17,19,25,29,33,24,46,47
12.3 #1-15 odd, 17-23 odd, 27,29,38
12.4 #1-9 odd, 11-19 odd
12.5 $1-5 odd, 9,11,13,19,21,25,29