Mary is baking a cake. The recipe calls for 35 cups of sugar and some more cups of flour. She already put in 7 cups of flour. If she still needs to add 4 more cups of flour How many cups of flour did the recipe require?
The recipe calls for 35 cups of sugar and some more cups of flour.

She already put in 7 cups of flour.

If she still needs to add 4 more cups of flour, that means she needs 4 more cups of flour in addition to the 7 cups of flour she's already put in. 

So, the recipe requires 11 cups of flour.