Cameras placed inside and outside (of) the house

[Topstudent]

He woke the screens, revealing live feeds from 10 different cameras placed inside and outside (of) the house.

Is 'of' necessary here? Does it change anything? Would you include it? Thanks.

 

[jutfrank]

Is it your sentence? Remember that you must cite the source of any text you ask us about.

No, it isn't. No, it doesn't change anything significant. Yes, I think I probably would but it's absolutely fine without it.

 

[emsr2d2]

I wouldn't use "of" there. Some people would.

Remember that we write out the numbers one to twenty (inclusive) as full words, not numbers, so it should say "ten different cameras".