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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. 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.
a set
a<x<b
w<0 and x>y
altitude of a triangle

2. Intersect at only one point - the point is the only solution to the pair of equations
consistent lines
right triangle
null set
obtuse angle

3. The percent increase from x to y (y>x)
(y-x/x)100
y angle< x angle
right triangle
radius of a circle

4. Volume= e(edge)³ surface area= 6e²
cube
xy< 0
negative reciprocal of the other
opposite the greatest side

5. 1-1-1 (60-60-60)
null set
equilateral triangle
1.7
angle

6. 1-v3- 2 (90-30-60)
right triangle
xy>0
the last digit is either 0 or 5
altitude of a triangle

7. The percent decrease from x to y ( y<x)
the sum of its digits is divisible by 9
equilateral triangle
domain of a relation
(x-y/x)100

8. Then their intersection is the null or empty set - written as Ø
properties of a square
x + y
if two sets have no elements in common
equilateral triangle

9. Square of hypotenuse = c² = a²+b² length of hypotenuse = c= va²+vb²
isosceles triangle
pythagorean theorem
simultaneous equations
the last three numbers are divisible by 8

10. The length of a segment whose endpoints are (x1 -y1) and (x2 -y2)
diameter
equal to the sum of the measures of the remote exterior angles
v(x2-x1)²+ (y2-y1)²
the sum of its digits is divisible by 9

11. 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.
central angle
times
angle bisector
x + y

12. 8-15-17
w>0 and x>y
if two sets have no elements in common
right triangle
simultaneous equations in 2 unknowns

13. x younger than y
positive
the percent of increase
x - y
rectangular solid

14. 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
always positive or zero
approx sums
Axioms
negative

15. 2k
right triangle
expression of an even number
parallelogram
circle

16. Of
w>0 and x>y
parallelogram
v(x2-x1)²+ (y2-y1)²
times

17. Area= 1/2?r2 length= 1/2?d= ?r perimeter= d(1/2? +1)
rectangle
1.7
sphere
semicircle

18. Any line that connects two points on a circle.
right triangle
1.4
22/7 or 3.14
chord

19. Any integer is divisible by 4 - if
y-x
the last two digits of the number make a number that is divisible by 4
medians of a triangle
opposite the greatest side

20. Product of two odd numbers is
and
or
360 degrees
odd

21. Area= 1/4s² v3 perimeter= 3s altitude= 1/2s v3
x%
properties of a rhombus
(x-y/x)100
equilateral triangle

22. If two lines are parallel - the slope of one is
equal to the slope of the other
the last two digits of the number make a number that is divisible by 4
y angle< x angle
right triangle

23. ?
closed set
a relation is a function
a+b+d=c+d
or

24. Are the lines that bisect and are perpendicular to each of the three sides. The point where they meet is the center of the circumscribed circle.
xy + xz
perpendicular bisectors
parallelogram
always positive or zero

25. All angles are right angles and diagonals are equal 1.each pair of opposite sides are equal 2. the diagonals bisect eachother 3. the opposite angles are equal 4. one diagonal divides it into two congruent triangles and two diagonals divides it into
y intercept
one solution
1/2
properties of a rectangle

26. (x1+ x2/2) - (y1+y2/2) Each coordinate of the midpoint is equal to the average of the corresponding cordinates of the endpoints
midpoint of a line segment joining 2 parts
simultaneous equations
v2/2 or .71
closed set

27. V10
3.16
1.4
when finding a solution set
obtuse angle

28. (amount of increase/original amount) x 100
vertical angles
the percent of increase
slope of a line joining two points
x²-2xy+y²

29. 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
standard deviation
right triangle
right triangle
parallelogram

30. Set of solutions to an equation
solution set
x - y
set
any variable

31. x more than y
x + y
no solutions
permutations
circle

32. Is always a right angle.
belongs to
x is greater than y
two solutions
angle inscribed in semicircle

33. ?if y angle< x angle - then
belongs to
a side< b side
perpendicular bisectors
rectangular solid

34. x < y or y> x
similar triangles
v2/2 or .71
vertical angles
x is less than y

35. 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)
1.4
cylinder
probability
isosceles triangle

36. Between 90° and 180°
obtuse angle
regular polygon properties
relation
associative axiom of addition and multiplication

37. /100 (the ______ number over 100)
rectangle
±vx
percent
x<0

38. (x-y)(x-y) = (x-y)²
x percent
is a subset of
x²-2xy+y²
the last three numbers are divisible by 8

39. A line that is perpendicular to a radius and that passes through only one point of the circle.
y angle< x angle
+y
tangent
opposite the greatest side

40. The quotient of any quantity (except 0) divided by zero is infinity
average
never divide by zero
equilateral triangle
rectangle

41. V2/2- v2/2 - 1 (90-45-45)
y-x
right angle
isosceles triangle
right triangle

42. In a triangle - the greatest angles lies
range of a relation
opposite the greatest side
right triangle
x + y

43. Pairs of opposite angles formed by the intersection of two straight lines. always equal to each other
vertical angles
1.4
w>0 and x>y
a<x<b

44. N= number of objects (order matters!!!) k= rate at a time nPk= n!/(n-k)! (remember to cancel common numbers)
standard deviation
radius of a circle
approx products
permutations

45. ? if a side < b side - then
the sum of parts
standard deviation
y angle< x angle
average

46. In transversals
all acute angles are equal and all obtuse angles are equal
n percent less than x
parallelogram
the percent of decrease

47. x less than y
y-x
associative axiom of addition and multiplication
(y-x/x)100
right triangle

48. Product of an even number and any other number is
vertical angles
never divide by zero
polygon
even

49. One angle is equal 90° and the other two angles are equal to the sum of 90°
even
right triangle
when finding a solution set
(x/100)m= n

50. x(y+z)
approx square roots
x>y>0 and w>z>0
xy + xz
approx sums