A book has 38 chapters. The second chapter is 10 pages long. If there are a total of 26 pages in the book How many pages are in the first chapter?
There are a total of 38 chapters in the book. 
The second chapter is 10 pages long. 
There are a total of 26 pages in the book. 

From this, we can infer that the first chapter is 16 pages long.