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GRE Quantitative Reasoning
Flashcards based on Kaplan's book
33
Mathematics
Graduate
08/27/2011
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Term
1/8
 Definition
12.5%, .125
Term
1/6
 Definition
16.66, .16
Term
1/5
 Definition
20%, .2
Term
1/4
 Definition
25%, .25
Term
1/3
 Definition
33.3%, .333
Term
3/8
 Definition
37.5%, .375
Term
2/5
 Definition
40%, .4
Term
1/2
 Definition
50%, .5
Term
3/5
 Definition
60%, .6
Term
5/8
 Definition
62.5%, .625
Term
2/3
 Definition
66.66%, .66
Term
3/4
 Definition
75%, .75
Term
4/5
 Definition
80%, .8
Term
5/6
 Definition
83.3%, .833
Term
7/8
 Definition
87.5%, .875
Term
equilateral triangle
 Definition
angles 60 deg, all sides equal
Term
isosceles
 Definition
2 sides same, angles facing same,
Term
right triangle
 Definition
a^2+b^2=c^2
Term
3:4:5 right triangle
 Definition
can be 6:8:10, 9:12:15, etc
Term
5:12:13 right triangle
 Definition
can be 10:24:26, etc
Term
isosceles right triangle
 Definition
1:1:sq rt 2
Term
30 deg-60 deg-90 deg triangle
 Definition
2:2sqrt3:4
Term
Area of a circle
 Definition
pi r^2
Term
Adding and subtracting fractions
 Definition
find common denominator
Term
multiply fractions
 Definition
multiply numerator, then denominator
Term
dividing fractions
 Definition
flip the numerator and denominator and multiply
Term
adding or subtracting decimals
 Definition
align the decimal point
Term
multiplying decimals
 Definition
move decimal from the right
Term
dividing decimals
 Definition
move decimal in the divisor to form a whole number, move other number the same
Term
PEDMAS
 Definition
parentheses, exponents (and radicals), multiplication and division (from left to right), Addition and subtraction (from left to right)
Term
Sum of consecutive numbers
 Definition
sum=(average)x(number of terms)
Term
Average of consecutive numbers
 Definition
(small+big)/2
Term
using average to find the sum
 Definition
sum=(average)x(number of terms)
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