Quant Flashcards
1
Q
12 X 4
A
48
2
Q
12 X 5
A
60
3
Q
12 X 6
A
72
4
Q
length of triangle sides
A
less than sum of 2 sides, greater than difference
5
Q
12 X 7
A
84
6
Q
12 X 8
A
96
7
Q
12 X 9
A
108
8
Q
12 X 11
A
132
9
Q
12 X 12
A
144
10
Q
2^4
A
16
11
Q
2^5
A
32
12
Q
2^6
A
64
13
Q
2^7
A
128
14
Q
2^8
A
256
15
Q
2^9
A
512
16
Q
2^10
A
1024
17
Q
11^2
A
121
18
Q
13^2
A
169
19
Q
14^2
A
196
20
Q
15^2
A
225
21
Q
16^2
A
256
22
Q
Divisible by 3?
A
sum of digits = multiple of 3
23
Q
Divisible by 4?
A
Last two digits are divisible by 4
24
Q
Divisible of 6?
A
Even and sum of digits is multiple of 3
25
Divisible by 9?
Sum of digits is multiple of 9
26
Multiplication w/ decimals
Multiply as normal... count decimals places... answer has same number of decimals
27
144 / 1.2
144/12 -> 12 -> 120
28
1.44 / 12
144/12 -> 12 -> .12
29
Multiple
negative numbers are multiples
30
Checking prime numbers between A and B
only have to check up to n where n^2 is less than B
| *check
31
Unique factor trick (how man unique factors does n have?)
Find prime factors (i.e. 2,2,3,7) --> take exponents (2, 1, 1) --> add 1 to exp and multiply together --> 3X2X2 = 12
32
Zero?
even, multiple of every number, factor of no number, neither pos or neg
33
65
5 X 13
34
What can't you do with inequalities?
Subtract!
35
30 : 60 : 90
1 : rt(3) : 2
36
45 : 45: 90
1 : 1 : rt(2)
37
Equilateral triangle
All angles are 60 deg
38
Area //-ogram
b * h
39
Area of trapezoid
(1/2) * (b+b) * h
40
Area (equil. triangle)
s^2*rt(3)*(1/4)
| *check
41
Inscribed angles
Central angle = inscribed *2
42
Check yo self
0 and 1
pos/neg
non-int
43
x^2 < x
x = between 0 and 1
44
DS: why are you here?
violate CNS (clearly ns)
45
have x^2
look for quadratic
46
when x is divided by 3, the remainder is 2
x = 2, 2+3 (5), 8, 11, 14
47
Probability (E or F)
P(E) + P(F) - P(E and F)
48
Circular permutions
of ways to arrange n distinct objects along a circle is (n-1)!
49
Common triangles
3-4-5 ;
5-12-13;
9-12-15.
50
Distance
Rate X Time
51
rt(2) and rt(3)
1.4; 1.7
52
A(union)B
= A + B - A(int)B
53
Percent change
(new - orig) / orig * 100
54
Similar triangle
if sides are X 2 ---> area is X 2^2 (4)
55
V(sphere)
(4/3)*pi*r^3
56
avg speed
total dist / total time
57
simple interest earned
P X rate X years = total interest earned
58
Compound Interest
Final Balance = (principal)*(1+r/C)^(n*C)
n = time
C = number of times compounded
i.e.) $10,000 compounded quartertly at 8% = 10k*2/100 + 10k... New amount*2/100+new amount... etc
59
Total (Venn Diagram)
Total = X + Y - Both + Neither
60
Terminating decimal?
Reduce to simplest terms--> must be only 2s and 5s in denominator
61
LCM
Finds prime factors --> take highest power which each occur and multiply. --> 6 = 2 X 3. 9 = 3 X 3. LCM = 3X3X2=18
62
GCF
Of then have to be on both (2X3X3X5)
