GRE Math Flashcards
(47 cards)
1
Q
(x^a)^b
A
x^ab
2
Q
X x X
A
x^2
3
Q
x^-a
A
1//x^a
4
Q
x^a/x^b
A
x^a-b
5
Q
x^ax^b
A
x^a+b
6
Q
x^0
A
1
7
Q
(negative)^odd
A
negative
8
Q
(negative)^even
A
positive
9
Q
Speed
A
distance/time
10
Q
Average Speed
A
Total Distance/Total Time
11
Q
Rate
A
Quantity of A/ Quantity of B
12
Q
Percent Increase
A
{(New amount- original amount)/original amount} x 100%
13
Q
Percent Decrease
A
{(Original Amount- New Amount)/ original amount} x 100%
14
Q
Interior Angles of Triangle
A
180
15
Q
Exterior Angles of Triangle
A
360
16
Q
Area of Triangle
A
1/2base x height
17
Q
Hypotenuse of a 45-45-90 Triangle
A
2 sides are equal (x). Hypotenuse is x√2
18
Q
Hypotenuse of a 30-60-90 Triangle
A
Sides are x, x√3, hypotenuse is 2x
19
Q
Diameter
A
2r
20
Q
Circumfrence
A
2πr or πd
21
Q
Area of Circle
A
πr^2
22
Q
Area of square
A
s^2
23
Q
Area of rectangle
A
length x width
24
Q
Area of Parallelogram
A
base x height
25
Area of Trapezoid
1/2(base1 +base2)height
26
Volume of cylinder
πr^2height
27
Surface area of cylinder
2πr^2 + 2πrh
28
Volume of Cube
lengh x width x height
29
Surface Area of Cube
2(lw + lh +wh)
30
√a√b
√ab
31
√a/√b
√a/b
32
a√c +b√c
(a +b)√c
33
√a +√b
√a+b
34
ab +ac
a(b+c)
35
x% of y
y% of x
36
Slope
(y2-y1)/(x2-x1)
37
Common Prime Numbers
2,3,5,7,11,13,17,19
38
Prime Factorization
Factor tree
39
Distance on a Number Line
Ticks are values and intervals are distance (upper -lower)/number of intervals
40
Distance of 2 Coordinates
√([x2-x1]^2 + [y2-y1]^2)
41
Midpoint of 2 Coordinates
(x1 + x2)/2, (y1 +y2)/2
42
Multiplying or Dividing in Inequalities
By negative number switch the sign, positives stay same
43
Compound Inequalities
Must add/subtract/multiply and divide all terms
44
Adding and Subtracting Fractions
Common denominator stays the same, different denominator changes
45
Multiplying Fractions
Multiply Across
46
Dividing Fractions
Reciprocal
47
Probability
When independent events, multiply probability of each
