find the number of walls ! . sounds simple ?

JEE Advanced Sample Questions › Olympiad Stuff questions › find the number of walls ! . sounds simple ?

The figure here shows a 3 x 3 grid. As you can see each cell can have maximum four walls. What is maximum number of walls that a N x N grid can have? This 3 x 3 grid has 24 walls.

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Lokesh Verma ·2009-11-05 20:20:36

for a n x n grid, the number of walls will be nx(n+1)x2

I think the method is obvious?

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Basic Integral Calculus Operators Symbols Matrix Cases

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° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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find the number of walls ! . sounds simple ?

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