All GMAT Math Resources
Example Questions
Example Question #1982 : Problem Solving Questions
Each of stands for a real number; if one appears more than once in a choice, it stands for the same number each time.
Which of the following diagrams demonstrates the transitive property?
If then
If and , then
If and , then
According to the transitive property of equality, if two numbers are equal to the same third number, they are equal to each other. This is demonstrated by this diagram:
If and , then
Example Question #1983 : Problem Solving Questions
Each of stands for a real number; if one appears more than once in a choice, it stands for the same number each time.
Which of the following diagrams demonstrates the symmetric property?
If and , then
If then
If then
According to the symmetric property of equality, if one number is equal to another, the second is equal to the first. This is demonstrated by the diagram
If then
Example Question #1984 : Problem Solving Questions
Each of stands for a real number; if one appears more than once in a choice, it stands for the same number each time.
Which of the following diagrams demonstrates an identity property?
If then
If and , then
0 is called the additive identity, since it can be added to any number to yield, as a sum, the latter number. This property is demonstrated in the diagram
Example Question #30 : Real Numbers
is the additive inverse of .
Which of the following is equivalent to
for all values of the variables?
If is the additive inverse of , then
, or, equivalently,
Substituting,
.
Example Question #431 : Arithmetic
is the additive inverse of .
Which of the following is equivalent to
for all values of the variables?
If is the additive inverse of , then
.
It follows by way of the commutative and associative properties that
Example Question #31 : Understanding Real Numbers
is the additive inverse of . Which of the following expressions is equivalent to
for all values of the variables?
If is the additive inverse of , then
, or, equivalently,
By way of the distributive property and substitution,
Example Question #1982 : Problem Solving Questions
is the multiplicative inverse of . Which of the following expressions is equivalent to
for all values of the variables?
If is the multiplicative inverse of , then
,
or, equivalently,
.
By way of substitution and the distributive property,
Example Question #34 : Real Numbers
is the multiplicative inverse of .
Which of the following is equivalent to
for all values of the variables?
If is the multiplicative inverse of , then
.
By way of the commutative and associative properties, substitution, and the identity property of multiplication:
Example Question #431 : Arithmetic
When evaluating each of the following expressions, which one(s) require you to multiply first?
I)
II)
III)
I and II only
I only
II and III only
III only
I and III only
I and III only
According to the order of operations, any operations within parentheses must be performed first. In expression (II), this is the addition; in expression (III), this is the multiplication.
Expression (I) does not have any parentheses, so, by the order of operations, in the absence of grouping symbols, multiplication precedes addition.
Therefore, the correct response is I and III only.
Example Question #36 : Real Numbers
is the multiplicative inverse of . Which of the following expressions is equivalent to
for all values of the variables?
By the distributive property,
is the multiplicative inverse of , meaning that, by defintion, , so
.
is the correct choice.