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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. 1-1-v2 (90-45-45)
inscribed angle
inverse of a relation
right triangle
the sum of its digits is divisible by 9

2. Between 90° and 180°
x²-2xy+y²
isosceles triangle
v(x2-x1)²+ (y2-y1)²
obtuse angle

3. Volume= e(edge)³ surface area= 6e²
cube
x>y
inscribed angle
the percent of increase

4. Square of hypotenuse = c² = a²+b² length of hypotenuse = c= va²+vb²
sphere
all acute angles are equal and all obtuse angles are equal
angle a and angle b = angle d
pythagorean theorem

5. 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
a?n
x+y/xy
standard deviation
similar triangles

6. The case where the two equations are equivalent (just two different forms of the same mathematical relation). Any point that satisfies either of the equations - automatically satisfies both
implies
w>0 and x>y
coinciding lines
sphere

7. A¹
a
xy-xz
approx sums
area of a triangle

8. 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
the square of x
approx square roots
radius
the last digit is either 0 or 5

9. Sin 60°
v3/2 or .87
v2/2 or .71
solution set
or

10. 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 two pairs of congruent triangles
reflex angle
diameter of circle
properties of parallelograms
360 degrees

11. If two lines are parallel - the slope of one is
the last digit is either 0 or 5
area of a triangle
equal to the slope of the other
equilateral triangle

12. Of
times
simultaneous equations in 2 unknowns
equilateral triangle
negative

13. The lines that divide each angle of the triangle into two equal parts. these lines meet in a point that is the center of a circle inscribed in the triangle.
the sum of its digits is divisible by 3
angle bisector
medians of a triangle
x²-y²

14. V2
1.4
+y
then side b > side a
commutative axiom of addition and multiplication

15. Any integer is divisible by 9 - if
the sum of its digits is divisible by 9
the third side
w>0 and x>y
n percent greater than x

16. ?if y angle< x angle - then
a side< b side
x-y/xy
the sum of its digits is divisible by 3
a<x<b

17. A/A¹ = B/B¹= C/C¹
similar triangles
associative axiom of addition and multiplication
the percent of increase
b+d>c+e

18. Area= 1/2bh perimeter= a + b+ c hypotenuse= c²= b²+a²
properties of a rhombus
x>y>0 and w>z>0
right triangle
isosceles

19. (amount of increase/original amount) x 100
approx square roots
perpendicular bisectors
opposite the greatest side
the percent of increase

20. 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
triangle or straight line
xy>0
right triangle

21. ?
22/7 or 3.14
if two sets have no elements in common
associative axiom of addition and multiplication
x is greater than y

22. (x+y)(x+y)= (x+y)²
x²+ 2xy+y²
chord
equal
square

23. The distance between two parallel lines or from a point to a line always means
x - y
the perpendicular distance
(y-x/x)100
combinations

24. All even numbers end in the digits of
22/7 or 3.14
(y-x/x)100
belongs to
0 - 2 - 4 - 6 - 8

25. B>c+ d>e
the percent of increase
reflex angle
find the intersection of two sets
b+d>c+e

26. The product of an odd number of negative numbers is
n percent greater than x
negative
angle bisector
-y

27. (3+5) +6= 3+ (5+6) and (3x5)6= 3(5x6)
x + y
similar triangles
sphere
associative axiom of addition and multiplication

28. Angles directly across each other are equal
xy>0
vertical angles
trapezoid
implies

29. When two parallel lines are crossed by a third straight line (transversal) - then
similar triangles
when finding a solution set
all acute angles are equal and all obtuse angles are equal
a side< b side

30. x/100
x percent
x and y
x-y/xy
the last digit is either 0 or 5

31. The whole equals
the sum of parts
inscribed angle
right triangle
then side b > side a

32. A+b=c+ d=d
if the last digit of the number is 0 -2 -4 -6 -8
a+b+d=c+d
right angle
x and y

33. 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.
perpendicular bisectors
xy-xz
a relation is a function
1.4

34. Write down every member that the two sets have in common. The intersection of the sets A and B is a set written AnB
triangle or straight line
find the intersection of two sets
coinciding lines
x²+ 2xy+y²

35. The point where the line crosses the y-axis - x will always = 0 in this case
y intercept
is a subset of
area of a triangle
0 - 2 - 4 - 6 - 8

36. Any line that connects two points on a circle.
chord
xy
1.4
x - y

37. Distributive axiom - commutative axiom of addition and multiplication - associative axioms of addition and multiplication
finding the union of sets
straight angle
semicircle
Axioms

38. 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.
hexagon
right triangle
never divide by zero
n= mx/100

39. x older than y
x + y
n= mx/100
+y
set

40. The distance from the center of the circle
x²+ 2xy+y²
radius
sphere
angle a and angle b = angle d

41. All three sides and all three angles are equal
xy>0
similar triangles
times
equilateral triangle

42. 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
properties of a rectangle
even
never divide by zero
chord

43. When the elements of a set are ordered pairs
the sum of its digits is divisible by 3
equal
v(x2-x1)²+ (y2-y1)²
relation

44. Area= 1/2h(b1+b2) perimeter= b1+b2+c+d
area of a triangle
parallel
trapezoid
even

45. ?
properties of a square
polygon
and
even

46. One angle is equal 90° and the other two angles are equal to the sum of 90°
equilateral triangle
x intercept
right triangle
relation

47. Side a +side b of a ? is
equilateral triangle
the last digit is either 0 or 5
n percent less than x
greater than c

48. (amount of decrease/original amount) x 100
w<0 and x>y
right triangle
x>y>0 and w>z>0
the percent of decrease

49. 1/2bh
x + y
area of a triangle
finding the union of sets
standard deviation

50. If ?B > ?A - then
slope of a line joining two points
1.7
then side b > side a
a?n