# GMAT Quant Review

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1. On HARD problems, avoid answers that are:
Numbers already presented in the problem
2. Medium problems almost always require ________
two or more steps
3. If a quadratic equation is shown in factored form:
distribute it immediately
4. Ff a quadratic equation is shown in distributed form:
factor it immediately
5. "SUM"
6. "Difference"
The result of subtraction
7. "Product"
The result of multipication
8. "Quotient"
The result of division
9. P E M D A S
Parenthesis - Exponents - Multiplication - Division - Addition - Subtraction
10. Associcative Law:
When adding or multiplying a series of #'s, they can be grouped and upground in anyway
11. WHen dealing with propotion and ratios, always think of what to concepts:
& what's left over
12. Whenever possible, convert decimels to fractions...
0.2 =
13. 0.25 =
14. 0.33333 =
15. 0.4 =
16. 0.6 =
17. 0.66666
18. 0.75 =
19. 0.8 =
20. Trick to multiplication with decimels:
remove, multiply, and move decimel back total spaces
21. Trick to dividing with fractions:
Convert divisor into whole number, move decimel of dividend an equal number of spaces.
22. Ratios are be expressed in ways:
Part to ______ &
Part to ______
&
23. Formula for Mixed Groups:

Group 1 +_____ - _____ + _______ = Total
Group 1 + Group 2 - Both + Neither = Total
24. Median, if n is odd,:
Middle most number
25. Median, if n is even,:
SUM of middle two number, divided by 2
26. Range of a series
Largest value - smallest value
27. Mode of a series
number that occurs most frequently
28. Laws of exponents:
Multiply with the same base:
29. Laws of exponents:
Dividing with the same base:
Subtract the exponents: =
30. Laws of exponents:
Raising Power to Power:
Multiply the exponents:
31. Law of Exponents:
Distributing Exponents:
Exponent outside parenthesis must be distributed to applied to all number within: (4)^2(y)^2=16y^2
32. Laws of Exponents:
Does
NO!
33. Laws of Exponents:
Does
NO!
34. Laws of Exponents:
When items are included in parenthesis and in a fraction:
NO, because of the parenthesis
35. Laws of Exponents:
If you raise a positive fraction less than 1 to a power....
it gets smaller
36. Laws of Exponents:
If you raise a negative number to an odd power....
it gets smaller
37. Laws of Exponents:
Any number is a negative power is equal to...
it's reciprocal
40. When pluggin in values, always start answer checking at:
A, then Try E, and narrow in from there
41. When pluggin in, always ask yourself:
What number make this problem easy for me?
42. When pluggin in:
If question contains hours and days:
Choose 24 as a plug
43. When plugging in:
If question contains minutes and hours:
Choose 60 as a plug value
44. When pluggin in:
If question deals with %'s
Choose 100 is almost always convenient
45. When pluggin in values contained in the answer: