GMAT Flashcards
(126 cards)
1
Q
x^0 = ?
A
1
2
Q
What is the percent formula?
A
part = percent x whole
3
Q
What is the formula for percent change?
A
amount of change/original amount x 100%
4
Q
Odd + Odd = ?
A
Even
5
Q
Odd - Odd
A
Even
6
Q
Even + Even
A
Even
7
Q
Even - Even
A
Even
8
Q
Odd + Even
A
Odd
9
Q
Odd - Even
A
Odd
10
Q
Positive + Positive =
A
Positive
11
Q
Positive - Negative =
A
Positive
12
Q
Negative + Negative =
A
Negative
13
Q
Negative - Positive =
A
Negative
14
Q
Positive + Negative =
A
?
15
Q
Positive - Positive =
A
?
16
Q
Negative + Positive =
A
?
17
Q
Negative - Negative =
A
?
18
Q
Positive x Positive =
A
Positive
19
Q
Positive / Positive =
A
Positive
20
Q
Negative x Negative =
A
Positive
21
Q
Negative / Negative =
A
Positive
22
Q
Positive x Negative =
A
Negative
23
Q
Negative / Positive =
A
Negative
24
Q
Even + Odd
A
Odd
25
Even - Odd
Odd
26
Odd x Odd
Odd
27
Even x Even
Even
28
Odd x Even
Even
29
Even x Odd
Even
30
Even / Even
Even, Odd, Non-Integer
31
Odd / Odd
Odd, Non-Integer
32
Even / Odd
Even, Non-Integer
33
Odd / Even
Non-Integer
34
An integer is divisible by 2 if...
It's even
35
An integer is divisible by 3 if...
The sum of its digits is a multiple of 3
36
An integer is divisible by 4 if...
Its last two digits are divisible by 4 (it can be divided by 2 twice)
37
An integer is divisible by 5 if...
It ends in 5 or 0
38
An integer is divisible by 6 if...
It is divisible by both 2 and 3
39
An integer is divisible by 8 if...
It can be divided by 2 three times
40
An integer is divisible by 9 if...
The sum of its digits is a multiple of 9
41
An integer is divisible by 12 if...
It is divisibe by both 3 and 4
42
If a number is divisible by N, it is also divisible by...
All factors of N.
43
1/5 =
20%
44
2/5 =
40%
45
1/20 =
5%
46
1/8 =
12.50%
47
1/6 =
16.67%
48
1/12 =
8.33%
49
7/8 =
87.50%
50
5/6 =
83.33%
51
3/8 =
37.50%
52
5/8 =
62.50%
53
13^2
169
54
14^2
196
55
15^2
225
56
16^2
256
57
17^2
289
58
18^2
324
59
19^2
361
60
20^2
400
61
2^3
8
62
2^4
16
63
2^5
32
64
2^6
64
65
2^7
128
66
3^3
27
67
3^4
81
68
3^5
243
69
4^3
64
70
4^4
256
71
5^3
125
72
sq rt of 2
1.4
73
sq rt of 3
1.7
74
sq rt of 625
25
75
sq rt of 169
13
76
Primes between 1 and 50 (there are 15)
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47
77
5th root of 243
3
78
Which integers have had odd number of factors?
perfect squares
79
When powers with the same base are multiplied, how do you solve?
The powers are summed and the base is held constant
80
When powers with the same base are divided, how do you solve?
The powers are subtracted and the base is held constant
81
When a number taken to a power is taken to another power, how do you solve?
Multiply the exponents
82
Sum of consecutive integers = ?
The mean x the number of terms
83
Sum of elements of an evenly spaced set = ?
(a1 + an)/2 x n
84
Compound interest forumla
principal x (1 + interest/C)^(years x C) C = number of periods
85
Sum of angles in a triangle =
180 degrees
86
One side of a triangle is always _____ than the sum of the other two and ____ than the distance between them
smaller, greater
87
Common right triangle sides (5)
1 - 3, 4, 5 2 - 6, 8, 10, 3 - 5, 12, 13 4 - 12, 16, 20 5 - 7, 24, 25
88
What is the relationship between sides in a right isosceles triangle?
x, x, x root 2 units long
89
What is the relationship between agnles in a right isosceles triangle?
90, 45, 45 degrees
90
What is the value of sides in a 30-60-90 triangle?
x, x root 3, 2x (hypotenuse)
91
Tangent
line touching the circle at one point only; tangent lines are always at 90 degrees to the radius
92
Slope of a line equations
rise/run, y2-y1/x2-x1
93
How to find the X and Y intercepts of a line?
Use equation of the line, y=mx + b. Use y=0 when looking for x interecpt, use x=0 when looking for the y intercept
94
The relationship between slopes of 2 perpendicular lines is??
negative reciprocal
95
The sum of interior angles of a polygon
(n-2) x 180 where n is the number of sides
96
area of a trapezoid
((base1 + base2) x height)/2
97
area of a parallelogram
base x height
98
area of a rhombus
(diagonal 1 x diagonal 2)/2
99
surface area
the sum of the areas of all the faces
100
In a triangle, angles correspond to the ____ side?
opposite
101
Similar triangle
all corresponding angles are equal and corresponding sides are in proportion
102
Arc length
circumference x angle/360
103
perimeter of a sector (in a circle)
arc + 2 radius
104
If one of the sides of an inscribed triangle is the diamater, it is a _____ triangle
right
105
An exterior angle of a triangle is equal to?
the sum of the two opposite angles
106
Slope of x axis
zero
107
Slope of y axis
undefined
108
Define the variables in y = mx + b
m = slope, b = y-intercept
109
Negative # raised to an odd power
Negative result
110
Negative # raised to an even power
Positive result
111
a ^ -n =
1/a^n
112
a^m * a^n =
a^(m+n)
113
a^m/a^n =
a^(m-n)
114
a^m*b^m =
(ab)^m
115
(a^m)^n =
a^mn
116
An even root is defined to be (neg/pos)?
Positive
117
An odd root of a negative number is ?
Negative
118
An odd root of a positive number is ?
Positive
119
sqrt (ab) =
sqrt a * sqrt b
120
sqrt (a/b) =
sqrt a/sqrt b
121
The absolute value of 0
0
122
|x| is greater than/equal to 0 is ____ true
always
123
In absolute value equations, if you multiply or divide both sides by a negative quantity, you must ...
Flip the sign
124
Do not multiply or divide both sides of an inequality...
By a variable unless you are sure of its sign
125
Each additional power of a number between 0 and 1 gets (larger/smaller)
Smaller
126
Distance formula (geometric plane)
sqrt ((x1-x2)^2 + (y1-y2)^2))
