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 #9 : How To Find The Missing Part Of A List

Five candidates are running for school board. A voter chooses two of the candidates.

Which is the greater quantity? 

(a) The number of ways a voter can mark his or her ballot

(b) 

 

Possible Answers:

It is impossible to tell from the information given

(a) and (b) are equal

(b) is greater

(a) is greater

Correct answer:

(b) is greater

Explanation:

This is a choice of two out of five without regard to order - that is, the number of combinations of two out of a set of five. This is

There are ten possible ways to choose, and .

Example Question #10 : How To Find The Missing Part Of A List

Assorted 2

Refer to the above diagram. The top row gives a sequence of figures. Which figure on the bottom row comes next?

Possible Answers:

Figure (c) 

Figure (d) 

Figure (b) 

Figure (a)

Correct answer:

Figure (c) 

Explanation:

The square with the diagonal line alternates between the square on the left and the square on the right. Therefore, the next figure in the sequence will have its diagonal line in the rightmost square, eliminating Figures (b) and (d) and leaving Figures (a) and (c).

Also, the shaded square moves one position  to the right from figure to figure, so in the next figure, the shaded square must be the one at the extreme right. Figure (c) matches that description.

Example Question #1 : Geometry

Give the equation of the line through point  that has slope .

Possible Answers:

Correct answer:

Explanation:

Use the point-slope formula with 

Example Question #2 : Geometry

Which is the greater quantity?

(A) The slope of the line 

(B) The slope of the line 

Possible Answers:

It is impossible to determine which is greater from the information given

(B) is greater

(A) and (B) are equal

(A) is greater

Correct answer:

(A) is greater

Explanation:

Rewrite each in the slope-intercept form,  will be the slope.

The slope of this line is .

 

The slope of this line is .

 

Since , (A) is greater.

Example Question #2 : Coordinate Geometry

Which is the greater quantity?

(A) The slope of the line 

(B) The slope of the line 

Possible Answers:

(A) is greater

(A) and (B) are equal

It is impossible to determine which is greater from the information given

(B) is greater

Correct answer:

(A) and (B) are equal

Explanation:

Rewrite each in the slope-intercept form,  will be the slope.

The slope of the line of  is 

 

The slope of the line of  is also 

 

The slopes are equal.

Example Question #2 : Geometry

 and  are positive integers, and . Which is the greater quantity?

(a) The slope of the line on the coordinate plane through the points  and .

(b) The slope of the line on the coordinate plane through the points  and .

Possible Answers:

(b) is the greater quantity

It is impossible to determine which is greater from the information given

(a) and (b) are equal

(a) is the greater quantity

Correct answer:

(a) and (b) are equal

Explanation:

The slope of a line through the points  and  can be found by setting 

in the slope formula:

The slope of a line through the points  and  can be found similarly:

The lines have the same slope.

Example Question #3 : Coordinate Geometry

A line passes through the points with coordinates  and , where . Which expression is equal to the slope of the line?

Possible Answers:

Undefined

Correct answer:

Explanation:

The slope of a line through the points  and , can be found by setting 

:

in the slope formula:

Example Question #1 : How To Find The Points On A Coordinate Plane

Choose the best answer from the four choices given.

The point (15, 6) is on which of the following lines?

Possible Answers:

Correct answer:

Explanation:

For this problem, simply plug in the values for the point (15,6) into the different equations (15 for the -value and 6 for the -value) to see which one fits.

          (NO)

 

         (YES!)

 

      (NO)

 

       (NO)  

Example Question #2 : How To Find The Points On A Coordinate Plane

Choose the best answer from the four choices given.

What is the point of intersection for the following two lines?

Possible Answers:

Correct answer:

Explanation:

At the intersection point of the two lines the - and - values for each equation will be the same. Thus, we can set the two equations as equal to each other:

 

 

 

 

 

 

 

point of intersection

Example Question #3 : How To Find The Points On A Coordinate Plane

Choose the best answer from the four choices given.

What is the -intercept of the line represented by the equation

Possible Answers:

Correct answer:

Explanation:

In the formula , the y-intercept is represented by (because if you set to zero, you are left with ).

Thus, to find the -intercept, set the value to zero and solve for .

 

 

 

 

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