ISEE Middle Level Quantitative : ISEE Middle Level (grades 7-8) Quantitative Reasoning

Study concepts, example questions & explanations for ISEE Middle Level Quantitative

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Example Questions

Example Question #162 : How To Find The Area Of A Parallelogram

David wants to put a fence around his backyard. How much fencing will he need if his backyard is  by 

 

Possible Answers:

Correct answer:

Explanation:

The fence is going around the backyard, so this is a perimeter problem. 

Example Question #209 : Quadrilaterals

David wants to put a fence around his backyard. How much fencing will he need if his backyard is  by 

 

Possible Answers:

Correct answer:

Explanation:

The fence is going around the backyard, so this is a perimeter problem. 

Example Question #132 : How To Find The Perimeter Of A Rectangle

David wants to put a fence around his backyard. How much fencing will he need if his backyard is  by 

 

Possible Answers:

Correct answer:

Explanation:

The fence is going around the backyard, so this is a perimeter problem. 

Example Question #511 : Rectangles

David wants to put a fence around his backyard. How much fencing will he need if his backyard is  by 

 

Possible Answers:

Correct answer:

Explanation:

The fence is going around the backyard, so this is a perimeter problem. 

Example Question #1211 : Isee Lower Level (Grades 5 6) Quantitative Reasoning

What is the length of a rectangular room with a perimeter of  and a width of 

 

Possible Answers:

Correct answer:

Explanation:

We have the perimeter and the width, so we can plug those values into our equation and solve for our unknown. 

Subtract  from both sides

Divide  by both sides

Example Question #1 : How To Find The Area Of A Rectangle

If the length of a rectangle is twice the width, and the width is three inches, what is the area of the rectangle?

Possible Answers:

Correct answer:

Explanation:

In order to find the area of a rectangle we use the formula

In this problem, we know the width is .  We also know that the length is twice as long as the width, which can be written as .  This means that in order to find the length, we must multiply the width by .

Now that we know that our length is , we simply multiply it by our width of .

The area of the rectangle is .

 

 

Example Question #1 : How To Find The Area Of A Rectangle

Using the information given in each question, compare the quantity in Column A to the quantity in Column B.

A certain rectangle is seven times as long as it is wide.

Column A          Column B

the rectangle's   the rectangle's

perimeter          area

(in units)           (in square units)

Possible Answers:

The two quantities are equal.

The quantity in Column B is greater.

The relationship cannot be determined from the information given.

The quantity in Column A is greater.

Correct answer:

The relationship cannot be determined from the information given.

Explanation:

This type of problem reminds us to be wary of simply plugging in numbers (which works with certain problems). If you were to choose 1 and 7 here, the perimeter would be larger; if you chose 10 and 70, the area would be much larger.

To solve this problem with variables:

From here we can see that smaller values of will lead to a larger perimeter, while larger values of will lead to a larger area.

The answer cannot be determined.

Example Question #2 : How To Find The Area Of A Rectangle

Which is the greater quantity?

(a) The surface area of a rectangular prism with length 60 centimeters, width 30 centimeters, and height 15 centimeters

(b) The surface area of a cube with sidelength 300 millimeters

Possible Answers:

(a) is greater

(b) is greater

It is impossible to tell from the information given

(a) and (b) are equal

Correct answer:

(a) is greater

Explanation:

(a) The surface of a rectangular prism comprises six rectangles, so we can take the sum of their areas.

Two rectangles have area: .

Two rectangles have area: .

Two rectangles have area: .

Add the areas: 

(b) The surface of a cube comprises six squares, so we can square the sidelength - which we rewrite as 30 centimeters - and multiply the result by 6:

.

 

The first figure has the greater surface area.

Example Question #1 : Rectangles

Column A                                   Column B

The area of a                              The area of a square

rectangle with sides                     with sides 7cm.

11 cm and 5 cm.

Possible Answers:

The quantity in Column A is greater.

There is no way to determine the relationship between the columns.

The quantity in Column B is greater.

The quantities in both columns are equal.

Correct answer:

The quantity in Column A is greater.

Explanation:

First, you must calculate Column A. The formula for the area of a rectangle is . Plug in the values given to get , which gives you . Then, calculate the area of the square. Since all of the sides of a square are equal, the formula is , or . Therefore, the area of the square is , which gives you . Therefore, the quantity in Column A is greater.

Example Question #118 : Geometry

Rectangles

Figure NOT drawn to scale

Refer to the above figure. The area of Rectangle  is 1,000. Give the area of Rectangle .

Possible Answers:

Correct answer:

Explanation:

The area of a rectangle is the product of its length and its width. 

Since the area of Rectangle  is 1,000, 

Substitute 40 for  in the height of Rectangle  and calculate the area as follows:

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