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GRE Math Strategies

Subjects : gre, math

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. (x+y)(x+y)= (x+y)²
the sum of its digits is divisible by 9
x²+ 2xy+y²
x-y
1/2

2. (amount of increase/original amount) x 100
if the last digit of the number is 0 -2 -4 -6 -8
the percent of increase
properties of a rectangle
simultaneous equations in 2 unknowns

3. x²
simultaneous equations
equal to the slope of the other
v3/2 or .87
the square of x

4. Area= 1/4s² v3 perimeter= 3s altitude= 1/2s v3
b+d>c+e
equilateral triangle
negative
the perpendicular distance

5. Of
times
two solutions
hemisphere
angle inscribed in semicircle

6. Two tangents to a circle from the same point outside of the circle are always
xy< 0
finding the union of sets
equal
the square of x

7. ?
x is less than y
and
the sum of its digits is divisible by 9
angle inscribed in semicircle

8. N is what % of m
x>y and w>z
simultaneous equations in 2 unknowns
n= mx/100
x intercept

9. 1/2bh
0 - 2 - 4 - 6 - 8
or
area of a triangle
x percent

10. ?if y angle< x angle - then
1 - 3 - 5 - 7 - 9
the square of x
a side< b side
properties of parallelograms

11. Angles that equal 180 degrees
supplementary angles
angle a and angle b = angle d
angle
angle bisector

12. xn<0 if n is odd and xn>0 if n is even
Axioms
v(x2-x1)²+ (y2-y1)²
equilateral triangle
x<0

13. 1. square all choices given 2. select the closes choice that is too large and the one that is too small. 3. find the average of the two choices (not of the squares) 4. square the average - if it is greater than the original number - choose the lower
approx square roots
positive
straight angle
area of a triangle

14. Diagonal= sv2
if two sets have no elements in common
times
associative axiom of addition and multiplication
diagonal of a square

15. The increase from x to y
parallel
consistent lines
x-y
y-x

16. x - (n/100)x
n percent less than x
slope of a line joining two points
closed set
properties of a rectangle

17. Area = ?r² circumference(perimeter)= 2?r
opposite the greatest side
determining if a number is prime
obtuse angle
circle

18. x+w> y+z
x>y and w>z
approx square roots
n percent less than x
distributive axiom

19. When the elements of a set are ordered pairs
coinciding lines
relation
a relation is a function
set

20. 5+3= 3+5 and 5 x 3= 3 x 5
commutative axiom of addition and multiplication
even
a?n
sphere

21. Any integer is divisible by 5 if
trapezoid
the last digit is either 0 or 5
average
hexagon

22. A<x and x<b
equilateral triangle
area of a triangle
a<x<b
even

23. Side a +side b of a ? is
equilateral triangle
when finding a solution set
greater than c
domain of a relation

24. ?
right triangle
is a subset of
hemisphere
and

25. xw> yz
x>y>0 and w>z>0
closed set
+y
approx sums

26. The length of a segment whose endpoints are (x1 -y1) and (x2 -y2)
x²+ 2xy+y²
y-x
regular polygon properties
v(x2-x1)²+ (y2-y1)²

27. If two lines are perpendicular - the slope of one is the
right triangle
negative reciprocal of the other
x and y
n= mx/100

28. Pairs of opposite angles formed by the intersection of two straight lines. always equal to each other
set
and
vertical angles
x - y

29. x + y
x and y
Axioms
a relation is a function
(x/100)m= n

30. Between 180° and 360°
expression of an even number
equilateral triangle
pythagorean theorem
reflex angle

31. (x1+ x2/2) - (y1+y2/2) Each coordinate of the midpoint is equal to the average of the corresponding cordinates of the endpoints
n= mx/100
the percent of increase
midpoint of a line segment joining 2 parts
the third side

32. 1. determine a rough approximation of the square root of the number. 2. divide the number by all the primes that are less than the approx square root. If the number is not divisible by ANY of the these primes - then it is prime. If it IS divisible -
it is also divisible by 2 and 3
determining if a number is prime
closed set
one solution

33. 1. round each number being added to one more place than it is being asked. 2. add the rounded numbers. 3. round off the sum to the desired number of places
simultaneous equations in 2 unknowns
when finding a solution set
approx sums
it is also divisible by 2 and 3

34. Volume= bh or ?r²h surface area= 2?rh (w/o bases) or 2?r(h+r) with bases
y intercept
equilateral triangle
x<0 and z=x+y
cylinder

35. If an equation can be put into the form y= mx +b - then
reflex angle
if the last digit of the number is 0 -2 -4 -6 -8
trapezoid
b is the y-intercept

36. M=number of favorable ways n= total number of ways (two events occurring is the prob of the first times the prob of the second)
v3/2 or .87
altitude of a triangle
perpendicular
probability

37. 8-15-17
y angle< x angle
1.4
right triangle
triangle

38. 1/an
y-x
simultaneous equations
a?n
the square of x

39. x(y+z)
x + y
implies
the last two digits of the number make a number that is divisible by 4
xy + xz

40. If b²-4ac > 0 there are
two solutions
obtuse angle
rectangle
xy + xz

41. M= y2-y1/x2-x1
slope of a line joining two points
even
circle
obtuse angle

42. If two lines are parallel - the slope of one is
triangle or straight line
finding the union of sets
isosceles
equal to the slope of the other

43. Angle whose sides are two radii of the circle. The vertex of this angle is the center of the circle. The number of degrees is equal to the amount of arc length that the radd intercept.
and
central angle
isosceles triangle
sphere

44. Area= 1/2bh perimeter= a+b+c
and
pythagorean theorem
angle
triangle

45. B²-4ac = 0 there is
even
one solution
inverse of a relation
xy< 0

46. 180°
if the last digit of the number is 0 -2 -4 -6 -8
straight angle
percent
n percent less than x

47. Any integer is divisible by 10 - if
the last digit is 0
it is also divisible by 2 and 3
no solutions
or

48. A¹
inconsistent lines
a
angle
regular polygon properties

49. Any arc length is less than
x + y
x>y and w>z
angle
360 degrees

50. V2
then side b > side a
v(x2-x1)²+ (y2-y1)²
no solutions
1.4