Suppose that you have a supply of red, blue, green, and yellow squares. What is the fewest number of different colors needed to form a 3X3 square of tiles so that no tile touches another tile of the same color?

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

4th option is correct xy=-10

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