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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>0 and y>0 or x<0 and y<0
altitude of a triangle
xy>0
greater than c
xy

2. Sin 45°
x<0
v2/2 or .71
consistent lines
diameter

3. xw> yz
xy< 0
implies
+y
x>y>0 and w>z>0

4. Sin 60°
hexagon
v3/2 or .87
equal to the sum of the measures of the remote exterior angles
combinations

5. x + (n/100)x
1.7
when finding a solution set
and
n percent greater than x

6. Area= s² perimeter= 4s
regular polygon properties
xy>0
square
diameter

7. The percent decrease from x to y ( y<x)
medians of a triangle
(x-y/x)100
360 degrees
equal to the slope of the other

8. If b²-4ac > 0 there are
all acute angles are equal and all obtuse angles are equal
altitude of a triangle
(x-y/x)100
two solutions

9. 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
equilateral triangle
central angle
approx square roots
obtuse angle

10. N= number of objects (order matters!!!) k= rate at a time nPk= n!/(n-k)! (remember to cancel common numbers)
permutations
1
approx square roots
angle inscribed in semicircle

11. 2k + 1
combinations
x + y
expression of an odd number
0 - 2 - 4 - 6 - 8

12. A¹
approx square roots
or
a
the last digit is either 0 or 5

13. 1/2d
semicircle
no solutions
radius of a circle
the third side

14. (amount of decrease/original amount) x 100
right triangle
coinciding lines
the percent of decrease
always positive or zero

15. Is drawn from the vertices perpendicular to the opposite sides. The lengths of these lines are useful in calculating the area of the trinagle since the area of the triangle is 1/2bh and the height and the _____are the same.
0 - 2 - 4 - 6 - 8
altitude of a triangle
y intercept
if the last digit of the number is 0 -2 -4 -6 -8

16. If two lines are perpendicular - the slope of one is the
x%
negative reciprocal of the other
commutative axiom of addition and multiplication
1

17. V3
diameter of circle
1.7
approx sums
x percent

18. 8-15-17
x>y and y>z
1/2
right triangle
two solutions

19. In a triangle - the greatest angles lies
opposite the greatest side
x>y>0 and w>z>0
w>0 and x>y
(x-y/x)100

20. N is what % of m
n= mx/100
radius
odd
perpendicular

21. Area= 1/4s² v3 perimeter= 3s altitude= 1/2s v3
(x-y/x)100
equilateral triangle
v(x2-x1)²+ (y2-y1)²
angle a and angle b = angle d

22. A closed plane whose sides are straight lines. The sum of the angles is equal to 180(n-2) - where n is the number of sides.
polygon
the sum of parts
when finding a solution set
the last two digits of the number make a number that is divisible by 4

23. The distance from the center of the circle
opposite the greatest side
odd
probability
radius

24. Then their intersection is the null or empty set - written as Ø
the last two digits of the number make a number that is divisible by 4
the sum of its digits is divisible by 3
if two sets have no elements in common
domain of a relation

25. 3-4-5
right triangle
the sum of its digits is divisible by 9
the percent of decrease
coinciding lines

26. If b²-4ac < 0 - there are
-y
w<0 and x>y
no solutions
commutative axiom of addition and multiplication

27. z>y
when finding a solution set
it is also divisible by 2 and 3
360 degrees
x<0 and z=x+y

28. ?
domain of a relation
x²-y²
angle
if the last digit of the number is 0 -2 -4 -6 -8

29. A line that is perpendicular to a radius and that passes through only one point of the circle.
22/7 or 3.14
expression of an even number
tangent
medians of a triangle

30. V2/2- v2/2 - 1 (90-45-45)
1.7
isosceles triangle
similar triangles
xy>0

31. 5+3= 3+5 and 5 x 3= 3 x 5
chord
no solutions
commutative axiom of addition and multiplication
right triangle

32. If y²= x - then y =
x<0 and z=x+y
±vx
permutations
the sum of its digits is divisible by 9

33. 1. subtract each number from the average of the numbers 2. square the result of each of the numbers 3. add all those results and then divide by how many numbers you originally had. 4. take the square root of that result
v3/2 or .87
right triangle
standard deviation
properties of a rhombus

34. Between 180° and 360°
reflex angle
chord
x>y and y>z
n percent greater than x

35. 1/2bh
1 - 3 - 5 - 7 - 9
(x-y/x)100
regular polygon properties
area of a triangle

36. Any integer is divisible by 4 - if
v(x2-x1)²+ (y2-y1)²
the last two digits of the number make a number that is divisible by 4
the percent of decrease
1

37. If ?B > ?A - then
x>y
then side b > side a
trapezoid
equal

38. Any integer is divisible by 5 if
the last digit is either 0 or 5
angle a and angle b = angle d
b+d>c+e
even

39. Intersect at only one point - the point is the only solution to the pair of equations
1 - 3 - 5 - 7 - 9
one solution
consistent lines
or

40. If the base angles of a triangle are equal - the triangle is
isosceles
x intercept
sphere
domain of a relation

41. ? if a side < b side - then
v(x2-x1)²+ (y2-y1)²
y angle< x angle
x>y and w>z
supplementary angles

42. 360°
central angle
properties of a rectangle
circle
1/2

43. Area= bh perimeter= 2a +2b
distributive axiom
parallelogram
equal
a set

44. Diagonals divide into 6 equilateral triangles - the sides are equal to the sides of the ________. if inscribed in a circle - the length of each side is equal to the length of the radius of the circle.
n= mx/100
circle
hexagon
equal

45. Area = ?r² circumference(perimeter)= 2?r
sphere
circle
right triangle
central angle

46. The product of an even number of negative numbers is
positive
22/7 or 3.14
the last digit is either 0 or 5
angle

47. The distance between two parallel lines or from a point to a line always means
x²-y²
right triangle
1/2
the perpendicular distance

48. Any integer is divisible by 3 - if
negative reciprocal of the other
sphere
the sum of its digits is divisible by 3
the sum of its digits is divisible by 9

49. ?
x + y
never divide by zero
perpendicular
any variable

50. Write down every member that the two sets have in common. The intersection of the sets A and B is a set written AnB
Axioms
find the intersection of two sets
b+d>c+e
negative