There are 43 pages in the packet. The first three are the front cover and two pages of explanation about common core word problems. The even numbered pages are the question pages, and the odd number pages are the answer keys to the previous pages. There are five problems on each page. So there are a total of 100 problems in this packet, spread over 20 pages. The different types of problem are introduced gradually:
Page 4 introduces types A & G; page 5 is a duplicate page with the answers inserted. Page 6 has more of type A and G; page 7 the answer page. Page 8 introduces type D. Page 10 has more of type D. Page 12 introduces type B. Page 14 mixes types A, B, and G. Page 16 introduces types E and H. Page 18 mixes types A, B, G, and H. Page 20 mixes types D, E, and H. Page 22 mixes types A, B, D, E, & G. Page 24 mixes types A, B, D, E, and H. Page 26 introduces type C, and page 28 provides more practice. Page 30 mixes types A, B, C, G, and H. Page 32 introduces type F. Page 34 mixes types D, E, F, and H. Page 36 introduces type I. Page 38 introduces type J. Page 40 introduces type K. Page 42 introduces type L.
Hope this answers your questions!
January 23, 2013