exam Maths Puzzle Numerical Ability

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A garden area is 30 ft long and 20 ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft^2, what is the width of the path?

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exam Other Question
in the arrangement shown below

1 4 6 6 1
1 2 3 4 ? 9 3 2 2
1 1 1 1 1 5 9 2 2 1 1 1 1
2 1 1 1 8 3 2 4 2
3 3 5 2 2 2

find missing number 3 over a^-9 + 3 over a+3

over

4 over a^2-9 + 1 over a+3

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