Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

GRE Math Review

Basic Concepts Fractions,Decimals, & Exponents

QuestionAnswer
product of even # of negative #'s is always... (positive or negative) positive
the product of odd # of negative #'s is always.... (positive or negative) negative
to divide fraction (3/4) / (1/2).... invert divisor and multiply 3/4 x 2/1
to multiply decimals... 1) Count # of spaces to the right of decimal 2) multiply w/o decimal. 3) place decimal in the same space when done.
to divide decimals...(process) 1) convert divisor to whole # 2)move decimal point in Dividend to the right the same # of places 3) Divide. proportion of modified dec. = proportion of origional
what is a way to estimate a reference point when asked to find x% of a # ?... find 10% of the #
how do we compare ratios? ratios are the same as fractions, thus convert to common denominator to compare.
What is the Median of a set of #'s? the one in the middle, in a set of #'s
What is the Mode in a set of #'s? the most frequently occurring # of a set
When multiplying #'s with exponents, (name process) to multiply #'s w/ exponents... > add the exponents
When dividing #'s w/exponents...(name process) (2^4)/(2^2) = to divide #'s w/ exponents... > subtract the exponents (2^4)/2^2)= 2^(4-2)=2^2= 4
to raise a # w/ exponent to another power...(name process) to raise a # w/ exponent to another power... >multiply exponents
what is the relation of a negative power to a positive power? (10^-5)+(10^X)? Negative power is reciprocal of positive power. (10^-5)=(10^1/5)
Raising a fraction between 0-1 to a power greater than 1: results in.... Raising a fraction between 0-1 to a power greater than 1: >results in a # smaller than the original. (2/3)^3= (2/3)x(2/3)x(2/3)=8/27
Negative # raised to an even power results in.... (-X^2)= Negative # raised to an even power results in.... > a positive #: (-X^2)= +(X) x (X) (same as the product of two negative #'s)
#^0 = ?... #^0 = 1
Scientific Notation means.... of (300,000) would be?.... Scientific Notation means displaying large #'s as small numbers multiplied by power of 10. of (300,000)=(3 x 10^5)
the square root of a positive fraction w/ value of less than 1.. is...? the square root of a positive fraction w/ value of less than 1... > is larger than the original fraction
Exponents of 10 will always yield how many additional zeros? 10^x = 10 +(x-1) zeros 10^2=100...10^5=100,000 10^3=1000 10^4=
10^2....10^7= 10^2= 100 10^3=1000 10^4=10,000 10^5=100,000 10^6= 10,00,000 10^7=10,000,000....