Sarah’s house has 5 stories. If the first story has 10 windows, and the following stories have one l

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Sarah’s house has 5 stories. If the first story has 10 windows, and the following stories have one less window than the story below it, how many windows does Sarah’s house have?

1. Floor 1 has 10 windows
2. Floor 2 has 9 windows
3. Floor 3 has 8 windows
   
4. Floor 4 has 7 windows
   
5. Floor 5 has 6 windows

10 + 9 + 8 + 7 + 6 = 40 windows