exam Maths Puzzle Numerical Ability

Please o Please help me with this .I have a test on this tomorrow.

A store is holding a special clearence sale on a $ 200 coat .Initially there is a discount of 5 %. Every 2 ho

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Please help: The length of a rectangle is 4 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 136 feet, find the length of the rectangle. A^2 = x ------ (1)
4A^2= x+147 ------ (2)
(2)-(1) implies 147=3A^2 implies A^2=49 implies A=7 i.e,length of the sides = 7 cms