# GMAT Quant Review

 On HARD problems, avoid answers that are: Numbers already presented in the problem Medium problems almost always require ________ two or more steps If a quadratic equation is shown in factored form: distribute it immediately Ff a quadratic equation is shown in distributed form: factor it immediately "SUM" The result of addition "Difference" The result of subtraction "Product" The result of multipication "Quotient" The result of division P E M D A S Parenthesis - Exponents - Multiplication - Division - Addition - Subtraction Associcative Law: When adding or multiplying a series of #'s, they can be grouped and upground in anyway WHen dealing with propotion and ratios, always think of what to concepts: & what's left over Whenever possible, convert decimels to fractions... 0.2 = 0.25 = 0.33333 = 0.4 = 0.6 = 0.66666 0.75 = 0.8 = Trick to multiplication with decimels: remove, multiply, and move decimel back total spaces Trick to dividing with fractions: Convert divisor into whole number, move decimel of dividend an equal number of spaces. Ratios are be expressed in ways: Part to ______ & Part to ______ & Formula for Mixed Groups: Group 1 +_____ - _____ + _______ = Total Group 1 + Group 2 - Both + Neither = Total Median, if n is odd,: Middle most number Median, if n is even,: SUM of middle two number, divided by 2 Range of a series Largest value - smallest value Mode of a series number that occurs most frequently Laws of exponents: Multiply with the same base: Exponents can be added: Laws of exponents: Dividing with the same base: Subtract the exponents: = Laws of exponents: Raising Power to Power: Multiply the exponents: Law of Exponents: Distributing Exponents: Exponent outside parenthesis must be distributed to applied to all number within: (4)^2(y)^2=16y^2 Laws of Exponents: Does NO! Laws of Exponents: Does NO! Laws of Exponents: When items are included in parenthesis and in a fraction: NO, because of the parenthesis Laws of Exponents: If you raise a positive fraction less than 1 to a power.... it gets smaller Laws of Exponents: If you raise a negative number to an odd power.... it gets smaller Laws of Exponents: Any number is a negative power is equal to... it's reciprocal Laws of Radicals:  Laws of radicals:  When pluggin in values, always start answer checking at: A, then Try E, and narrow in from there When pluggin in, always ask yourself: What number make this problem easy for me? When pluggin in: If question contains hours and days: Choose 24 as a plug When plugging in: If question contains minutes and hours: Choose 60 as a plug value When pluggin in: If question deals with %'s Choose 100 is almost always convenient When pluggin in values contained in the answer: Start with 'C', and depending if outcome needs to be higher or lower, eliminate answers Pluggin in: "MUST BE/COULE BE" questions, 2 rules of thumb: May need to use more than one plug value to test expressionAttempt to use werid values, such as 1 and 0 Quadratic Equations to memorize:  Quadratic Equations to memorize:  Equation fro rate, time, and distance questions: ***Can be manipulated to solve for any values of r,d,&t Trick for WORK problems: How much work can be done in one unit of timeset up in fractional form Authorrjfisher ID135143 Card SetGMAT Quant Review DescriptionGMAT Foundational MathematicsAss Updated2012-02-14T16:51:38Z Show Answers