A book has 11 chapters. The first chapter is 30 pages long the second chapter is 17 pages long and the third chapter is 42 pages long. How many more pages does the first chapter have than the second chapter?
The first chapter has 30 pages. 
The second chapter has 17 pages. 
The third chapter has 42 pages. 

To find out how many more pages the first chapter has than the second chapter, we need to subtract the number of pages in the second chapter from the number of pages in the first chapter. 

30 - 17 = 13 

The first chapter has 13 more pages than the second chapter.