Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Gmat > Quant > Flashcards

Quant Flashcards

1
Q

What are the three decimals to the right of 1 called

A

Tenth
Hundredth
Thousandth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How do you multiply two decimals ?

A

Multiply them as integers. Then count the decimals and move the result to the right by that amount

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How do you divide Decimals ?

A

Move both decimals to the left until they are both integers.
Then divide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a terminating decimal?

A

Decimals has a finite number of digits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a non terminating decimal ?

A

A decimal with an infinite number of digits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What kinds of non-terminating decimals are there ?
And what are they?

A

Repeating: 0,45454545

and non repeating: Pi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What fractions will always be terminating?

A

Any fraction with the denominator of:
2, 5, 8, 10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Name the terminating x non terminating multiplication rules

A

Terminatin x Terminating = Terminating
Non x Terminating = Non
Non x Non = Non

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When should Plugging in be used ?

A
  • There are variables in the question and answer choice
  • The problem uses the phrase “ in terms of”

-You have the urge to do algebra

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are good numbers when Plugging in?

A
  • small numbers: 2, 3, 5, 10

-100 if the problems deals with percentages

-The product of distinct denominators if the problem has fractions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What numbers should be avoided when plugging in?

A

-0 and 1

-Numbers from the answers

-Conversion Factors such as 60 in problems including Minutes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When should the hidden Plug in be used?

A
  • The answers are fractions, percentages or ratios
  • There is no starting number

-You have the urge to write an equation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When should plugging in the answers be used ?

A
  • The answers are numbers

-The question uses phrases such as “how much” or “ how many”

-You have the urge to write and solve an equation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the steps of simplifying algebraic expressions ?

A
  1. Combine like terms
    —> first add and subtract, then divide and multiply
  2. Factor
    —> first pull apart the biggest number, then insert the rest
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How should 10x + 4x be factored ?

A
  1. Pull apart the biggest number
    —> 2x * (5 )
  2. Insert the rest
    —> 2x * (5 + 2)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a real number ?

A

-Anything that is defined in the number line

-Anything but infinity or negative roots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the - and + rules ?

A
  • -and - is always +
  • -and + is always -
    • and + is always +
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

When can Roots be added or subtracted?

A

-Only when the number under the radical and the power of the root is the same

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How are roots added and subtracted?

A

-The Numbers outside the roots are added and subtracted. The rest Stays the same

Ex: a{r + b{r = (a + b){r
Ex: a{r - b{r = (a - b){r

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

When can Roots be multiplied ?

A

-Only when the power of the roots is equal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How are roots Multiplied ?

A
  • multiply the number inside the root and the numbers outside the roots

Ex: {r * {s = {rs
Ex: a{r * b{s = (ab){rs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

How are roots divided by roots ?

A
  • the numbers under the radical are divided, the roots stays moves above both

Ex: {r{s = {r\s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is a root in the denominator ?

A

-improper
- denominator and nominative have to be multiplied by the root in order to removed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is MADSPM

A

-when multiplying roots Add
-when dividing roots subtract
-when roots are to the power of roots multiply

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What does a fractional Exponent mean?
-the number under the exponent is equal to a root - the nominative is the power of the number and the denominator is the power of the root Ex: x hoch 3\4 = vierte Wurzel x hoch 3
26
What does a negative exponent mean ?
-the number under the exponent is the denominator of a fraction to the power of the |value| of the power Ex: x to the power of -2 = 1/x to the power of 2
27
What is a nonzero number raised to the power of zero?
- 1
28
What is the standard form of a quadratic equation?
ax^2 + bx + c = 0
29
How many answers does a quadratic equation have?
- two at most
30
What is the basic approach to solving a quadratic equation ?
1. Sett the equation equal to zero (in the standard form) 2. Factor the equation
31
What are the steps when factoring a quadratic equation?
1. Split the quadratic 2. Find the factors of the last value 3. Of those factors find the two, that added or subtracted equal the b component 4. Find the values making the Formular equal to zero
32
What is a linear equation?
- An equation, where each variable has an exponent of one
33
How are linear equations solved ?
1. Combine like terms 2. Isolate the variable
34
When and how is cross multiplication used ?
- when both sides of the equation are fractions - by multiplying both sides with the denominator of the other side
35
What are the three forms in which ratios can be written
1. 2:3 2. 2 to 3 3. 2/5
36
How is a ratio written as a fraction?
- denominator is the sum of both sides of the ratio - the nominative is the side you want to express
37
When should proportions be used ?
When an unknown ratio compares the same items as a known ratio
38
How can proportions be solved ?
Cross multiply and simplify
39
What is the average of two lists
All numbers of both lists added divided by the number of items in both lists -not both averages added and divided by two
40
When are rates involved in questions?
-questions including speed or Amounts of work -questions including time
41
What is the speed formula ?
Speed = Distance * Time
42
What is the work formula ?
Work = Quantity Produced * Time
43
What is the Pay formula ?
Pay = Currency * Time
44
What is the relationship between a rate and time ?
Rate is the inverse of time
45
When are problems usually work problems ?
- when the rates at which a person or Maschine works is given
46
What is the basic work formula ?
1/a +1/b = 1/h
47
What are measurement questions?
Almost all questions including conversion rates
48
How are measurement questions solved ?
- Set up proportions and cross multiply
49
What is a quadratic equation
Equation for which the greatest exponent for any variable is 2
50
What are the common quadratics ?
1. x*2 - y*2 = (c + y)(x - y) 2. x*2 + 2xy + y*2 = (x + y)(x + y) 3. x*2 -2xy + y*2 = (x - y)(x - y)
51
What are the three types of counting methods ?
1. Multiple sources, single selection 2. Single sources, multiple selections 3. Multiple sources, multiple selections
52
How are multiple sources, single selection questions solved ?
Multiply the number of possibilities of each source
53
How are Single source, multiple selection questions solved?
1. Identify: there is a single source from which multiple times is selected 2. Does order matter? ( look for wehe words different arrangements) 3. If order matters: do not divide 4. If order does not matter: divide
54
How is the probability of P(A and B) calculated ?
P(A) * P(B)
55
How is the probability of P(A or B) calculated ?
P(A) + P(B) -P(A and B)
56
How is the probability of P(A) calculated ?
1- P(not A)
57
When should one use 1- P(not A)
Probability questions using the words at least
58
How are sequences of probabilities calculated ?
Multiply them - for sampling with replacement divide
59
How is the least common multiplier calculated ?
By multiplying the highest power prime factors of each distinct prime factor by the others.
60
What happens when a fraction is to the power of -1
The fraction is flipped

Gmat (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions