If the sides of a square are multiplied by sqrt(5), the area of the original square is how many times as large as the area of the resultant square?  Choose the correct choice.
A) 5 %	B) 20 %	C) 50 %	D) 100 %	E) 120 %

Rationale: let x be the original length of one side . then the original area is x ^ 2 . the new square has sides of length sqrt ( 5 ) * x , so the area is 5 x ^ 2 . the area of the original square is 1 / 5 = 20 % times the area of the new square . the answer is b .
Answer: B