All ISEE Upper Level Quantitative Resources
Example Questions
Example Question #51 : How To Find The Solution To An Equation
Consider the line of the equation .
Which is the greater quantity?
(a) The slope of this line
(b) The slope of a line perpendicular to this line.
(a) is greater
(b) is greater
It is impossible to tell from the information given
(a) and (b) are equal
(a) is greater
The slope of the line can be found by rewriting it in slope-intercept form:
The slope of this line is the coeffcient of , which is , a positive number. Since the slope of a line perpendicular to this line is its opposite reciprocal, it must be negative. This makes (a) greater.
Example Question #52 : How To Find The Solution To An Equation
Define an operation on two real numbers as follows:
For every real :
Which is the greater quantity?
(a)
(b)
(a) and (b) are equal
(a) is greater
(b) is greater
It is impossible to tell from the information given
(a) is greater
(a)
(b)
Example Question #53 : How To Find The Solution To An Equation
Quantity A: The number of days in weeks.
Quantity B: The number of hours in days.
Quantity B is greater.
The two quantities are equal.
Quantity A is greater.
There is not enough information to determine the relationship of the quantities.
Quantity A is greater.
Multiplying days per week by weeks, we find that there are days in weeks. Multiplying hours per day by days, we find that there are only hours in days.
Example Question #51 : Algebraic Concepts
Jim has quarters and nickles that together total . If the number of quarters and nickles were switched, his total amount of money would be less. How many quarters does Jim have?
If Jim has less when the number of coins is switched, then the switch scenario leaves him with .
The easiest way to solve this problem is to plug in the answer choices. If we plug in for the number of quarters he has, we find that he must also have nickles in order to equal . Reversing those numbers ( nickles and quarters) gives us the needed .
Example Question #51 : Equations
Quantity A: The mean of .
Quantity B: The mean of .
Quantity B is greater.
Quantity A is greater.
The two quantities are equal.
The relationship of the quantities cannot be determined from the information provided.
Quantity B is greater.
To find the mean, sum the terms and divide by the number of terms in the set.
Quantity A:
Quantity B:
Quantity B is larger.
Example Question #60 : Algebraic Concepts
When is divided by , the remainder is . What is the remainder when is divided by ?
Cannot be determined
Cannot be determined
Pick a number for that satisfies the condition for division by 15 and see what happens when it is divided by 7.
33 divided by 15 leaves a remainder of 3. 33 divided by 7 leaves a remainder of 5.
Let's try another number as well.
48 divided by 15 leaves a remainder of 3. 48 divided by 7 leaves a remainder of 6, which is different from the remainder left by 33.
Similarly, 63 divided by 15 leaves a remainder of 3. 63 divided by 7 leaves no remainder at all. Therefore, the answer cannot be determined.
Example Question #61 : How To Find The Solution To An Equation
In an aquarium, the ratio of sharks to clown fish is . If there are more clown fish than sharks, how many sharks are there?
Set up a proportion, where .
Cross multiply:
Distribute:
Combine like terms:
Divide both sides of the equation by 5:
There are 64 sharks.
Example Question #62 : How To Find The Solution To An Equation
In June, a company had a profit of million. In July, the company doubled that profit. In August, the company's profits rose by percent. If profits rise by another percent in September, what is the September profit?
million
million
million
million
million
million
The profit in July is twice the profit in June, or $6 million.
Because profits rise by 15% in August, August's profit is really 115% of July's profit:
Similarly, September's profit is 115% of August's profit:
Example Question #63 : How To Find The Solution To An Equation
Evaluate .
Subtract expressions:
or
Example Question #64 : How To Find The Solution To An Equation
If and , evaluate
It is impossible to tell from the information given.