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GMAT > Basic Arthimetic > Flashcards

Basic Arthimetic Flashcards

0
Q

1/6 =

A

.166

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1
Q

What does the square root of 3 equal approximately?

A

A little more than 1.5

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2
Q

.166=

A

1/6

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3
Q

5/6=

A

.833

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4
Q

.833=

A

5/6

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5
Q

1/8=

A

.125

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6
Q

.125

A

1/8

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7
Q

3/8=

A

.375

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8
Q

.375=

A

3/8

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9
Q

5/8=

A

.625

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10
Q

.625=

A

5/8

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11
Q

7/8=

A

.875

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12
Q

.875=

A

7/8

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13
Q

12x12

A

144

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14
Q

144

A

12x12

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15
Q

12x11

A

132

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16
Q

132

A

12x11

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17
Q

120

A

12x10

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18
Q

12x10

A

120

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19
Q

108

A

12x9

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20
Q

12x9

A

108

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21
Q

12x8

A

96

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22
Q

96

A

12x8

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23
Q

84

A

12x7

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24
Q

12x7

A

84

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25
Q

72

A

12x6

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26
Q

12x6

A

72

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27
Q

12x5

A

60

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28
Q

60

A

12x5

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29
Q

12x4

A

48

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30
Q

48

A

12x4

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31
Q

36

A

3x12

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32
Q

3x12

A

36

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33
Q

11^2

A

121

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34
Q

Sq root of 121

A

11

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35
Q

12 squared

A

144

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36
Q

Sq root 144

A

12

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37
Q

Sq root 169

A

13

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38
Q

13 squared

A

169

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39
Q

14 squared

A

196

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40
Q

Sq root 196

A

14

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41
Q

15 squared

A

225

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42
Q

Sq root 225

A

15

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43
Q

Perfect squares 10 to 15

A

100, 121, 144, 169, 196, 225

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44
Q

13x3

A

39

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45
Q

39/13

A

3

46
Q

13x4

A

52

47
Q

52/13

A

4

48
Q

52/4

A

13

49
Q

13x5

A

65

50
Q

13x6

A

78

51
Q

13x7

A

91

52
Q

13x8

A

104

53
Q

117/13

A

9

54
Q

11x10

A

110

55
Q

110/11

A

10

56
Q

11x12

A

132

57
Q

132/11

A

12

58
Q

132/12

A

11

59
Q

143/13

A

11

60
Q

143/13

A

11

61
Q

11x13

A

143

62
Q

12x13

A

156

63
Q

156/13

A

12

64
Q

Multiples of 1/9 appear as…

A

1/9=.111 2/9=.222 6/9=.666

65
Q

Divisible by 2

A

Even

66
Q

Divisible by 3?

A

Digits add to a number divisible by 3

67
Q

Divisible by 4?

A

Last two digits are divisible by 4

68
Q

Divisible by 5?

A

Ends in 0 or 5

69
Q

Divisible by 6

A

Divisible by 2 (even) and divisible by 3(all digits add to a number divisible by 3)

70
Q

Divisible by 9?

A

All digits add to a number divisible by 9

71
Q

Divisible by 10

A

Ends in zero

72
Q

Do the following produce integers?

Int + Int
Int - Int
Int)(Int
(Int)/(Int)

A

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
Q

What is a prime number?

A

It’s divisible only by 1 and itself

74
Q

Is 0 prime?

A

No

75
Q

Is 1 prime?

A

No

76
Q

Are negatives prime?

A

No

77
Q

What is the smallest prime number?

A

2

78
Q

What are the even prime numbers?

A

2

79
Q

What are linear equations?

A

Can be mapped on a coordinate grid. No exponents

80
Q

If you have n variables, how many distinct equations do you need to solve for the all the variables ?

A

N equations. Make sure that the equations are distinct and not just multiples of one another

81
Q

How do you solve multiple linear equations?

A

Substitution or combination. Most often you’ll need to use combination.

82
Q

What are traps on linear equations?

A

Radicals that indicate both positive and negative roots.

83
Q

Describe the steps to solve a linear equation

A 
Radicals
Eliminate denominators
Move all terms to one side
Combine like terms
Factor if necessary
Divide if necessary
84
Q

What are equations?

A

Anything with an equal sign. If it’s a word problem the word “is” often denotes and equal sign.

85
Q

What are inequalities?

A

The solve for a range of values.

86
Q

How do you sole inequalities?

A

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
Q

What combinations of decimals will appear in 1/7?

A

.142857 repeating

88
Q

X % written as a fraction is?

A

X/100

89
Q

Percent literally means:

A

Per 100

90
Q

Part/whole x 100 describes what?

A

A percent.

91
Q

X% of y =

A

Y% of X

92
Q

X% of Y=

A

(X/100)(Y)

93
Q

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?

A

0, 1, 5, 6,

94
Q

GMAT tests what numbers?

A

Real numbers! No i / imaginary numbers tested on the exam

95
Q

What is the strategy for unusual number property problems?

A

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
Q

Does (even)/(even) produce an even?

A

Sometimes yes/sometimes no. There are no universal odd/even divisibility rules. Ex: 12/2=6. 12/4=3.

97
Q

What are integers?

A

Whole numbers.

98
Q

Do integers include negatives?

A

Yes

99
Q

Do integers include 0?

A

Yes

100
Q

What are digits?

A

Numbers/Symbols 0 –> 9

101
Q

How many digits are there?

A
  1. 0–>9
102
Q

Why does distinct mean?

A

Only appears once

103
Q

Is zero positive or negative?

A

Neither!

104
Q

Is zero even or odd?

A

Even

105
Q

Is zero an integer?

A

Yes

106
Q

Is zero a multiple?

A

Yes, if every number

107
Q

Is zero prime?

A

No

108
Q

Describe the digits placement of 284.374

A

Hundredths/tenths/units.tens/hundredths/thousandths

109
Q

(Odd)(odd)=

A

ODD

110
Q

Odd + even

A

ODD.

111
Q

What combinations of odd/even produce odd numbers?

A

Only (odd)(odd) and (odd) +/- (even)

112
Q

Even x what is even?

A

Even x anything is EVEN

GMAT (6 decks)

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