You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: A book has 2 chapters across 23 pages. The first chapter is 10 pages long. 

 Question: How many pages are in the first chapter?
13

Context: Jake has 3 fewer peaches and 10 more apples than Steven. Steven has 12 peaches and 15 apples. 

 Question: How many more apples than peaches does Steven have?
3

Context: Mary is baking a cake. The recipe calls for 3 cups of sugar 10 cups of flour and 15 cups of salt. She already put in 6 cups of flour. 

 Question: How many more cups of flour does she need to add?

4