All ISEE Upper Level Quantitative Resources
Example Questions
Example Question #41 : Equations
The distance between Vandalia and Clark is 250 miles and is represented by six inches on a map. The distance between Vandalia and Ferrell is 125 miles.
Which is the greater quantity?
(a) The distance between Clark and Ferrell on a map
(b) Two inches
(a) is greater.
(a) and (b) are equal.
(b) is greater.
It is impossible to tell from the information given.
(a) is greater.
The actual distance between Clark and Ferrell is unknown, but it is at least miles. If is the map distance between Clark and Ferrell, then its minimum can be calculated using a proportion:
At the very least, the two are three inches apart on the map, so (a) is greater regardless.
Example Question #45 : How To Find The Solution To An Equation
Carl starts working for a bicycle store today. He wants to buy a certain bicycle, but his employee discount doesn't take effect until ninety days from now. He finds out that the price of the bicycle is due to increase by in sixty days.
Which is the greater quantity?
(a) The price Carl would pay for the bicycle today
(b) The price Carl would pay for the bicycle in ninety days, assuming that the bicycle does not change in price again
(a) is greater.
(b) is greater.
It is impossible to tell from the information given.
(a) and (b) are equal.
(b) is greater.
(a) Let be the current price of the bicycle. Without the discount and the markup, Carl would pay today.
(b) Now we examine what Carl would pay in ninety days. The increase would be of , or, equivalently, , and the price of the bicycle is
.
The employee discount will be of this, or , and the price Carl would pay is
.
Carl would pay more by waiting ninety days.
Example Question #42 : Equations
The distance between Vandalia and Clark is 250 miles and is represented by six inches on a map. The distance between Vandalia and Ferrell is 125 miles.
Which is the greater quantity?
(a) The distance between Clark and Ferrell on a map
(b) Ten inches
It is impossible to tell from the information given.
(b) is greater.
(a) is greater.
(a) and (b) are equal.
(b) is greater.
The actual distance between Clark and Ferrell is unknown, but at most it is miles. If is the map distance between Clark and Ferrell, then its maximum can be calculated using a proportion:
At the very most, the two are nine inches apart on the map, so (b) is greater regardless.
Example Question #43 : Equations
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) and (b) are equal.
Substitute to evaluate each expression:
(a)
(b)
Example Question #48 : How To Find The Solution To An Equation
A set of tires costs after a discount.
Which is the greater quantity?
(a) The price of the tires before the discount
(b)
(a) is greater.
It is impossible to tell from the information given.
(b) is greater.
(a) and (b) are equal.
(a) is greater.
A discount means that the tires sell for of their original price. If that original price is , then after the discount, they will sell for of . This is
,
which is less than . Therefore, the original purchase price must be greater than .
Example Question #49 : How To Find The Solution To An Equation
Define , .
Which is the greater quantity?
(a)
(b)
(a) is greater.
(b) is greater.
(a) and (b) are equal.
It is impossible to tell from the information given.
(a) is greater.
(a)
First, evaluate :
,
so .
Now, evaluate :
so .
(b)
First, evaluate :
,
so .
Now evaluate
,
so .
Example Question #51 : Algebraic Concepts
Define
Which is the greater quantity?
(a)
(b)
It is impossible to tell from the information given
(b) is greater
(a) and (b) are equal
(a) is greater
(a) and (b) are equal
(a) To evaluate , use the definition for nonnegative values of :
(b) To evaluate , use the definition for negative values of :
Example Question #52 : Algebraic Concepts
To convert Fahrenheit temperature to the equivalent in Celsius , use the formula
.
Which is the greater quantity?
(a)
(b)
It is impossible to tell from the information given
(b) is greater
(a) is greater
(a) and (b) are equal
(a) and (b) are equal
Convert to Celsius by substituting :
and are the same temperature.
Example Question #53 : Algebraic Concepts
Define
is positive. 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
It is impossible to tell from the information given
Substitute for in the definition of :
The relationship of this expression to 0 is uncertain for positive , as we see with these two cases:
Example Question #54 : Algebraic Concepts
Carl, the barista at Moose Jaw Coffee, has to mix together two kinds of coffee beans - Vanilla Heaven, which costs $10 a pound, and Mountain Goodness, which costs $15 a pound - to produce a coffee that costs $12 a pound. The beans in the mixture sell for the same price as they would separately.
Which is the greater quantity?
(a) The number of pounds of Vanilla Heaven beans he will use
(b) The number of pounds of Mountain Goodness beans he will use.
It is impossible to tell from the information given
(a) is greater
(b) is greater
(a) and (b) are equal
(a) is greater
Let and be, respectively, the number of pounds of Vanilla Heaven and Mountain Goodness beans he will use. Then the cost of the Vanilla Heaven beans will be $10 a pound times the number of pounds, or ; similarly, the cost of the Mountain Goodness beans will be . There will be pounds of beans total selling for $12 a pound, so the total cost will be . Therefore, we have the equation:
We can solve for :
Two-thirds as much Mountain Goodness coffee goes into the mix as Vanilla Heaven.