ISEE Upper Level Quantitative : ISEE Upper Level (grades 9-12) Quantitative Reasoning

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

varsity tutors app store varsity tutors android store

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.

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:

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) 

Possible Answers:

(a) and (b) are equal

(a) is greater

(b) is greater

It is impossible to tell from the information given

Correct answer:

(a) is greater

Explanation:

(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.

Possible Answers:

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. 

Correct answer:

Quantity A is greater.

Explanation:

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?

Possible Answers:

Correct answer:

Explanation:

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 .

Possible Answers:

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. 

Correct answer:

Quantity B is greater.

Explanation:

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 ?

Possible Answers:

Cannot be determined

Correct answer:

Cannot be determined

Explanation:

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?

Possible Answers:

Correct answer:

Explanation:

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?

Possible Answers:

 million

 million

 million

 million

 million

Correct answer:

 million

Explanation:

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 .

Possible Answers:

Correct answer:

Explanation:

 

Subtract expressions:

 

or 

Example Question #64 : How To Find The Solution To An Equation

If  and , evaluate 

Possible Answers:

It is impossible to tell from the information given.

Correct answer:

Explanation:

 

 

Learning Tools by Varsity Tutors