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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. 360°
+y
right triangle
circle
±vx

2. 3(4+1)= 3 x 4 + 3 x 1
-y
right triangle
distributive axiom
approx sums

3. 3-4-5
a relation is a function
the last digit is 0
x²-y²
right triangle

4. 9-40-41
all acute angles are equal and all obtuse angles are equal
right triangle
w<0 and x>y
the sum of its digits is divisible by 9

5. 180°
triangle or straight line
+y
hexagon
the perpendicular distance

6. 1-1-1 (60-60-60)
domain of a relation
equilateral triangle
3.16
trapezoid

7. A pair of equations in two unknowns (each is graphed seperately and each is represented by a straight line)
angle a and angle b = angle d
simultaneous equations
a
no solutions

8. Wx>wy
midpoint of a line segment joining 2 parts
relation
w>0 and x>y
hexagon

9. Sin 45°
x>y and w>z
x>y
the percent of increase
v2/2 or .71

10. Area= l x w perimeter = (2l)(2w)
trapezoid
the last two digits of the number make a number that is divisible by 4
1
rectangle

11. Is a rectangular rhombus 1. all four sides are equal 2. opposite pairs of sides are parallel 3. diagonals are equal - are perpendicular to each other - and bisect each other. 4. all the angles are right triangles 5. diagonals intersect the vertices a
expression of an odd number
properties of a square
x - y
diameter

12. Then their intersection is the null or empty set - written as Ø
1.4
implies
if two sets have no elements in common
the last two digits of the number make a number that is divisible by 4

13. 90°
right angle
then side b > side a
closed set
simultaneous equations

14. y years from now
the perpendicular distance
+y
parallel
the sum of its digits is divisible by 3

15. Any integer is divisible by 9 - if
x<0 and z=x+y
positive
the sum of its digits is divisible by 9
x is greater than y

16. A collection of anything - numbers - letters - objects - etc. written within brackets { } two are equal if they contain the same elements.(order does not matter)
properties of parallelograms
relation
set
hexagon

17. The percent increase from x to y (y>x)
(y-x/x)100
equal to the sum of the measures of the remote exterior angles
properties of a rectangle
approx sums

18. C²= a²+b² and angle x and y are equal to 90°
simultaneous equations in 2 unknowns
right triangle
simultaneous equations
xy-xz

19. 1/x + 1/y x -y ? 0
x+y/xy
x-y
xy>0
set

20. 5+3= 3+5 and 5 x 3= 3 x 5
cube
commutative axiom of addition and multiplication
domain of a relation
+y

21. x more than y
similar triangles
right triangle
x + y
360 degrees

22. Between 90° and 180°
obtuse angle
the last digit is 0
x-y/xy
all acute angles are equal and all obtuse angles are equal

23. x > y or y< x
y-x
right triangle
x>y
x is greater than y

24. Area= bh perimeter= 2a +2b
right triangle
perpendicular bisectors
obtuse angle
parallelogram

25. 2k + 1
expression of an odd number
diameter
w>0 and x>y
diameter of circle

26. Sin 30°
a?n
the percent of increase
the last digit is either 0 or 5
1/2

27. Square of hypotenuse = c² = a²+b² length of hypotenuse = c= va²+vb²
right triangle
1
pythagorean theorem
equilateral triangle

28. Any line that connects two points on a circle.
greater than c
chord
expression of an odd number
relation

29. 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.
isosceles
trapezoid
hexagon
odd

30. In a triangle - if ?c(interior angle in triangle) and ?d(exterior angle out of triangle) are supplmentary angles - than ?a and ?b are remote interior angles to <d - thus - a +b+c = 180 (triangle) c+d = 180 (supplementary angles)
inconsistent lines
angle a and angle b = angle d
commutative axiom of addition and multiplication
diameter

31. y<x
implies
x>y
equal to the sum of the measures of the remote exterior angles
a relation is a function

32. Wx<wy
w<0 and x>y
the last two digits of the number make a number that is divisible by 4
1
obtuse angle

33. 1/an
finding the union of sets
v3/2 or .87
n= mx/100
a?n

34. x - (n/100)x
x + y
relation
n percent less than x
positive

35. 1/2bh
area of a triangle
the percent of decrease
positive
regular polygon properties

36. | |
c x (john'S age)
times
x<0
parallel

37. x + (n/100)x
expression of an odd number
if the last digit of the number is 0 -2 -4 -6 -8
itself
n percent greater than x

38. Sum of two even numbers is
similar triangles
even
0 - 2 - 4 - 6 - 8
altitude of a triangle

39. M= y2-y1/x2-x1
equilateral triangle
x>y
positive
slope of a line joining two points

40. N= number of objects (order matters!!!) k= rate at a time nPk= n!/(n-k)! (remember to cancel common numbers)
permutations
the percent of decrease
associative axiom of addition and multiplication
y angle< x angle

41. The angles opposite to sides that are equal in length have
determining if a number is prime
combinations
x%
equal angles

42. Angles directly across each other are equal
vertical angles
commutative axiom of addition and multiplication
is a subset of
x is less than y

43. x +z > y+z
1.7
if the last digit of the number is 0 -2 -4 -6 -8
right triangle
x>y

44. If b²-4ac < 0 - there are
right triangle
quadratic equations
triangle or straight line
no solutions

45. 1-1-v2 (90-45-45)
right triangle
chord
the last digit is 0
a set

46. ? if a side < b side - then
right triangle
y angle< x angle
approx square roots
triangle

47. 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 -
times
determining if a number is prime
radius
similar triangles

48. The point where the line crosses the y-axis - x will always = 0 in this case
polygon
it is also divisible by 2 and 3
1.7
y intercept

49. x(y-z)
x>y
x²+ 2xy+y²
expression of an odd number
xy-xz

50. Pairs of opposite angles formed by the intersection of two straight lines. always equal to each other
vertical angles
equals
inconsistent lines
when finding a solution set