Basic Arthimetic Flashcards
(113 cards)
0
Q
1/6 =
A
.166
1
Q
What does the square root of 3 equal approximately?
A
A little more than 1.5
2
Q
.166=
A
1/6
3
Q
5/6=
A
.833
4
Q
.833=
A
5/6
5
Q
1/8=
A
.125
6
Q
.125
A
1/8
7
Q
3/8=
A
.375
8
Q
.375=
A
3/8
9
Q
5/8=
A
.625
10
Q
.625=
A
5/8
11
Q
7/8=
A
.875
12
Q
.875=
A
7/8
13
Q
12x12
A
144
14
Q
144
A
12x12
15
Q
12x11
A
132
16
Q
132
A
12x11
17
Q
120
A
12x10
18
Q
12x10
A
120
19
Q
108
A
12x9
20
Q
12x9
A
108
21
Q
12x8
A
96
22
Q
96
A
12x8
23
Q
84
A
12x7
24
12x7
84
25
72
12x6
26
12x6
72
27
12x5
60
28
60
12x5
29
12x4
48
30
48
12x4
31
36
3x12
32
3x12
36
33
11^2
121
34
Sq root of 121
11
35
12 squared
144
36
Sq root 144
12
37
Sq root 169
13
38
13 squared
169
39
14 squared
196
40
Sq root 196
14
41
15 squared
225
42
Sq root 225
15
43
Perfect squares 10 to 15
100, 121, 144, 169, 196, 225
44
13x3
39
45
39/13
3
46
13x4
52
47
52/13
4
48
52/4
13
49
13x5
65
50
13x6
78
51
13x7
91
52
13x8
104
53
117/13
9
54
11x10
110
55
110/11
10
56
11x12
132
57
132/11
12
58
132/12
11
59
143/13
11
60
143/13
11
61
11x13
143
62
12x13
156
63
156/13
12
64
Multiples of 1/9 appear as...
1/9=.111 2/9=.222 6/9=.666
65
Divisible by 2
Even
66
Divisible by 3?
Digits add to a number divisible by 3
67
Divisible by 4?
Last two digits are divisible by 4
68
Divisible by 5?
Ends in 0 or 5
69
Divisible by 6
Divisible by 2 (even) and divisible by 3(all digits add to a number divisible by 3)
70
Divisible by 9?
All digits add to a number divisible by 9
71
Divisible by 10
Ends in zero
72
Do the following produce integers?
| Int + Int
Int - Int
Int)(Int
(Int)/(Int)
Integers plus or minus integers always equal integers. Integers multiplied by integers always produce integers. Integers divided by integers do not necessarily produce integers.
73
What is a prime number?
It's divisible only by 1 and itself
74
Is 0 prime?
No
75
Is 1 prime?
No
76
Are negatives prime?
No
77
What is the smallest prime number?
2
78
What are the even prime numbers?
2
79
What are linear equations?
Can be mapped on a coordinate grid. No exponents
80
If you have n variables, how many distinct equations do you need to solve for the all the variables ?
N equations. Make sure that the equations are distinct and not just multiples of one another
81
How do you solve multiple linear equations?
Substitution or combination. Most often you'll need to use combination.
82
What are traps on linear equations?
Radicals that indicate both positive and negative roots.
83
Describe the steps to solve a linear equation
```
Radicals
Eliminate denominators
Move all terms to one side
Combine like terms
Factor if necessary
Divide if necessary
```
84
What are equations?
Anything with an equal sign. If it's a word problem the word "is" often denotes and equal sign.
85
What are inequalities?
The solve for a range of values.
86
How do you sole inequalities?
Same as equations but if you multiple or divide by a negative number you reverse the sign. Do not multiple or divide by a variable if you're unsure if it's positive or negative.
87
What combinations of decimals will appear in 1/7?
.142857 repeating
88
X % written as a fraction is?
X/100
89
Percent literally means:
Per 100
90
Part/whole x 100 describes what?
A percent.
91
X% of y =
Y% of X
92
X% of Y=
(X/100)(Y)
93
Any number ending in x multiplied by another number ending in x will produce a number ending in x. What numbers is this true for?
0, 1, 5, 6,
94
GMAT tests what numbers?
Real numbers! No i / imaginary numbers tested on the exam
95
What is the strategy for unusual number property problems?
Start doing something with smaller versions of the number set and look for patterns. EX: if it asks for a pattern in the units digit just focus on that and not the big number.
96
Does (even)/(even) produce an even?
Sometimes yes/sometimes no. There are no universal odd/even divisibility rules. Ex: 12/2=6. 12/4=3.
97
What are integers?
Whole numbers.
98
Do integers include negatives?
Yes
99
Do integers include 0?
Yes
100
What are digits?
Numbers/Symbols 0 --> 9
101
How many digits are there?
10. 0-->9
102
Why does distinct mean?
Only appears once
103
Is zero positive or negative?
Neither!
104
Is zero even or odd?
Even
105
Is zero an integer?
Yes
106
Is zero a multiple?
Yes, if every number
107
Is zero prime?
No
108
Describe the digits placement of 284.374
Hundredths/tenths/units.tens/hundredths/thousandths
109
(Odd)(odd)=
ODD
110
Odd + even
ODD.
111
What combinations of odd/even produce odd numbers?
Only (odd)(odd) and (odd) +/- (even)
112
Even x what is even?
Even x anything is EVEN
