All ISEE Upper Level Quantitative Resources
Example Questions
Example Question #11 : How To Find The Area Of A Rectangle
The perimeter of a rectangle is 210 inches. The width of the rectangle is 40% of its length. What is the area of the rectangle?
If the width of the rectangle is 40% of the length, then
.
The perimeter of the rectangle is:
The perimeter is 210 inches, so we can solve for the length:
The length and width of the rectangle are 75 and 30 inches; the area is their product, or
square inches.
Example Question #12 : How To Find The Area Of A Rectangle
is a positive integer.
Rectangle A has length and width ; Rectangle B has length and length . Which is the greater quantity?
(A) The area of Rectangle A
(B) The area of Rectangle B
(A) and (B) are equal
It is impossible to determine which is greater from the information given
(A) is greater
(B) is greater
(A) is greater
This might be easier to solve if you set .
Then the dimensions of Rectangle A are and . The area of Rectangle A is their product:
The dimensions of Rectangle B are and . The area of Rectangle B is their product:
regardless of the value of (or, subsequently, ), so Rectangle A has the greater area.
Example Question #13 : How To Find The Area Of A Rectangle
In Rectangle , and . Give the area of this rectangle in terms of .
The area of a rectangle is the product of its length and its width, which here are and . Mulitply:
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