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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. Product of two odd numbers is
is a subset of
the sum of its digits is divisible by 3
odd
hemisphere

2. 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
a+b+d=c+d
approx square roots
find the intersection of two sets
itself

3. The length of a segment whose endpoints are (x1 -y1) and (x2 -y2)
v(x2-x1)²+ (y2-y1)²
x>y
domain of a relation
find the intersection of two sets

4. x > y or y< x
the last digit is either 0 or 5
rectangular solid
probability
x is greater than y

5. /100 (the ______ number over 100)
percent
x - y
implies
inscribed angle

6. Any integer is divisible by 5 if
x<0 and z=x+y
v2/2 or .71
opposite the greatest side
the last digit is either 0 or 5

7. The distance between two parallel lines or from a point to a line always means
xy
find the intersection of two sets
properties of parallelograms
the perpendicular distance

8. When the elements of a set are ordered pairs
relation
x-y/xy
greater than c
finding the union of sets

9. All odd numbers end in the digits of
1 - 3 - 5 - 7 - 9
xy>0
even
null set

10. Wx>wy
w>0 and x>y
even
expression of an odd number
parallelogram

11. The decrease from x to y
x and y
it is also divisible by 2 and 3
x-y
two solutions

12. N= number of objects (order matters!!!) k= rate at a time nPk= n!/(n-k)! (remember to cancel common numbers)
right triangle
equal
triangle
permutations

13. 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)
angle a and angle b = angle d
finding the union of sets
the perpendicular distance
angle

14. Any integer is divisible by 10 - if
radius of a circle
closed set
the last digit is 0
x-y/xy

15. 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 -
determining if a number is prime
x is less than y
3.16
right triangle

16. M?A = m?D m?B= m?E m?C=m?F and a/d=b/e=c/f
right triangle
similar triangles
right triangle
probability

17. A+b=c+ d=d
a<x<b
1/2
a+b+d=c+d
x²-y²

18. (x-y)(x-y) = (x-y)²
x²-2xy+y²
the perpendicular distance
xy
x>y>0 and w>z>0

19. Is the relation with ALL ordered pairs REVERSED.
inverse of a relation
area of a triangle
semicircle
n percent less than x

20. ?
chord
implies
a+b+d=c+d
the sum of its digits is divisible by 9

21. C²= a²+b² and angle x and y are equal to 90°
rectangular solid
odd
right triangle
b is the y-intercept

22. If b²-4ac < 0 - there are
xy
no solutions
all acute angles are equal and all obtuse angles are equal
negative

23. Angles that equal 180 degrees
supplementary angles
range of a relation
x and y
180 degrees

24. x>0 and y<0 or x<0 and y >0
x<0
diameter of circle
parallel
xy< 0

25. If y²= x - then y =
xy< 0
isosceles triangle
±vx
odd

26. Sum of two odd numbers is
even
the last three numbers are divisible by 8
straight angle
22/7 or 3.14

27. The quotient of any quantity (except 0) divided by zero is infinity
probability
never divide by zero
x%
x>y and w>z

28. 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
approx sums
sphere
belongs to
right triangle

29. x/100
0 - 2 - 4 - 6 - 8
x%
cube
x is greater than y

30. 180°
triangle or straight line
chord
right triangle
properties of a rectangle

31. (amount of decrease/original amount) x 100
(x-y/x)100
solution set
the percent of decrease
isosceles triangle

32. Then their intersection is the null or empty set - written as Ø
if two sets have no elements in common
right triangle
straight angle
1.7

33. 7-24-25
angle bisector
supplementary angles
right triangle
percent

34. (x1+ x2/2) - (y1+y2/2) Each coordinate of the midpoint is equal to the average of the corresponding cordinates of the endpoints
opposite the greatest side
midpoint of a line segment joining 2 parts
approx square roots
isosceles triangle

35. 90°
angle a and angle b = angle d
x and y
right angle
even

36. x +z > y+z
360 degrees
1/2
x>y
equilateral triangle

37. Any line that connects two points on a circle.
belongs to
sphere
chord
distributive axiom

38. Are the lines drawn from each vertex to the midpoint of its opposite side. they cross at a point that divides each individual ______into two parts.
sphere
isosceles triangle
probability
medians of a triangle

39. 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.
radius
pythagorean theorem
central angle
x and y

40. If two lines are perpendicular - the slope of one is the
360 degrees
the third side
negative reciprocal of the other
the last three numbers are divisible by 8

41. The point where the line crosses the x-axis - y will always = 0 in this case
medians of a triangle
x intercept
properties of a rectangle
even

42. The point where the line crosses the y-axis - x will always = 0 in this case
y intercept
v3/2 or .87
then side b > side a
0 - 2 - 4 - 6 - 8

43. 1/2d
radius of a circle
parallel
it is also divisible by 2 and 3
1

44. In a triangle - the greatest angles lies
positive
360 degrees
opposite the greatest side
no solutions

45. Sin 45°
v2/2 or .71
x + y
1 - 3 - 5 - 7 - 9
n percent less than x

46. x>z
n percent greater than x
a<x<b
x>y and y>z
x intercept

47. 1/2bh
equal
right triangle
equals
area of a triangle

48. Is the set of the second components of the ordered pairs
negative
range of a relation
y angle< x angle
itself

49. Area= 1/2?r2 length= 1/2?d= ?r perimeter= d(1/2? +1)
right triangle
semicircle
odd
a

50. ? if a side < b side - then
associative axiom of addition and multiplication
positive
y angle< x angle
y-x