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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. The angles opposite to sides that are equal in length have
the third side
v(x2-x1)²+ (y2-y1)²
standard deviation
equal angles

2. M= y2-y1/x2-x1
slope of a line joining two points
hemisphere
x²+ 2xy+y²
negative

3. 180°
rectangular solid
hexagon
diameter
straight angle

4. The length of a segment whose endpoints are (x1 -y1) and (x2 -y2)
tangent
pythagorean theorem
v(x2-x1)²+ (y2-y1)²
x²+ 2xy+y²

5. Angles that equal 180 degrees
tangent
x²+ 2xy+y²
approx sums
supplementary angles

6. M?A = m?D m?B= m?E m?C=m?F and a/d=b/e=c/f
similar triangles
x-y
vertical angles
the perpendicular distance

7. V10
the sum of its digits is divisible by 3
3.16
360 degrees
y angle< x angle

8. x less than y
(y-x/x)100
standard deviation
x+y/xy
y-x

9. N= combinations taken (order does not matter) r= rate at a time nCr or C(n -r) = (n)!/(r)! (remember to cancel out common numbers)
equilateral triangle
standard deviation
polygon
combinations

10. If y²= x - then y =
±vx
x intercept
angle bisector
straight angle

11. R²
diameter of circle
properties of a square
x²-2xy+y²
never divide by zero

12. All odd numbers end in the digits of
x>y>0 and w>z>0
1 - 3 - 5 - 7 - 9
the last digit is 0
triangle or straight line

13. 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.
even
circle
x%
perpendicular bisectors

14. 180°
c x (john'S age)
triangle or straight line
odd
x>y and y>z

15. Ax= by + C
vertical angles
chord
the last three numbers are divisible by 8
simultaneous equations in 2 unknowns

16. Is - as - was - has - cost
expression of an even number
w<0 and x>y
similar triangles
equals

17. 8-15-17
right triangle
x<0
combinations
all acute angles are equal and all obtuse angles are equal

18. The decrease from x to y
radius
when finding a solution set
1
x-y

19. 1-v3- 2 (90-30-60)
pythagorean theorem
central angle
right triangle
find the intersection of two sets

20. The product of an even number of negative numbers is
x²-y²
greater than c
1/2
positive

21. If ?B > ?A - then
w<0 and x>y
the perpendicular distance
then side b > side a
simultaneous equations in 2 unknowns

22. x= -b + vb²-4ac/2a and x = -b - vb²-4ac/2a
quadratic equations
inconsistent lines
closed set
the square of x

23. Sin 45°
right triangle
v2/2 or .71
y intercept
b is the y-intercept

24. If two lines are perpendicular - the slope of one is the
equal
-y
negative reciprocal of the other
square

25. 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)
parallel
right angle
y intercept
angle a and angle b = angle d

26. A chord through the center of the circle
triangle
x²-2xy+y²
diameter
cylinder

27. 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
b+d>c+e
approx sums
circle
straight angle

28. 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 -
x percent
determining if a number is prime
right triangle
a side< b side

29. 1/an
y angle< x angle
w>0 and x>y
and
a?n

30. V2
1.4
odd
and
diagonal of a square

31. x + y
straight angle
x and y
y-x
all acute angles are equal and all obtuse angles are equal

32. x + (n/100)x
x>y
n percent greater than x
a+b+d=c+d
x - y

33. The point where the line crosses the y-axis - x will always = 0 in this case
percent
quadratic equations
x and y
y intercept

34. Square of hypotenuse = c² = a²+b² length of hypotenuse = c= va²+vb²
circle
n percent less than x
pythagorean theorem
supplementary angles

35. All three sides and all three angles are equal
parallelogram
right triangle
equilateral triangle
right triangle

36. When the elements of a set are ordered pairs
relation
x-y/xy
v(x2-x1)²+ (y2-y1)²
the third side

37. Sum of an odd and an even number is
equal
odd
any variable
right angle

38. x +z > y+z
x>y
1.7
angle inscribed in semicircle
x + y

39. x/100
rectangular solid
trapezoid
diagonal of a square
x percent

40. (amount of decrease/original amount) x 100
the percent of decrease
straight angle
the last digit is 0
central angle

41. x - (n/100)x
right triangle
circle
x + y
n percent less than x

42. Distributive axiom - commutative axiom of addition and multiplication - associative axioms of addition and multiplication
equal
times
hemisphere
Axioms

43. 1. round the numbers being multiplied to one more place than it is being asked. 2. Multiply the rounded off numbers 3. round of product to desired number of places
when finding a solution set
(x-y/x)100
isosceles triangle
approx products

44. Volume= 4/3?r² surface area= 4?r²
sphere
1
implies
even

45. x older than y
x + y
x>y and w>z
w<0 and x>y
equals

46. Area= 1/2?r2 length= 1/2?d= ?r perimeter= d(1/2? +1)
approx products
x+y/xy
properties of a square
semicircle

47. Wx<wy
equilateral triangle
the last three numbers are divisible by 8
y-x
w<0 and x>y

48. Area= 1/4s² v3 perimeter= 3s altitude= 1/2s v3
x<0
the perpendicular distance
itself
equilateral triangle

49. 360°
inconsistent lines
circle
equilateral triangle
simultaneous equations

50. (x-y)(x-y) = (x-y)²
expression of an even number
y angle< x angle
x²-2xy+y²
expression of an odd number