# homework help: Number Stairs … Is This Rule Correct? - Help.com

Rachel1991--x

GB

## Number Stairs …

Is This Rule Correct?? If So Hoe Do I Explain it??

3×3 no. stair = 6n+44
4×4 no. stair = 10n+110
5×5 no. stair = 15n+220
6×6 no. stair = 21n+385
7×7 no. stair = 28n+616

This open post was written 6 years, 10 months ago | V/U/S: 3,194, 9, 8 | Edit Post | Leave a reply | Report Post

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### Replies (9)

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C.M.Theisen changed the tags on this post: they were "number, Four-wheel drive, 616, 385, 110, please, Help, Six-wheel drive, Boeing 7x7, Stair, homework" 6 years, 10 months ago.

C.M.Theisen invited 1 user to read this post 6 years, 10 months ago.

This is all correct

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does any1 no the formula for any size stair on any size grid

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6n + 4g + 4

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hello

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Doesn’t the final equation have something to do with summation and the formula for triangle numbers?

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yes

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how do you get the 44 in 6n+44 could you please explain ???

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