All odd problems have the answers in the back of the book. You should check the odd answers before continuing on to the even problems.

Period 2 and 3:

Page 5-7: # 1-4, 10-23, 27-30, 36-41, 48-54 even

Period 5:

Page 5-7: # 1-4, 14-20, 23, 28-31, 35-46, 51-54