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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. 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)






2. Volume= 2/3?r² surface area= 2?r² (w/o bases) or 3?r² (with bases)






3. The angles opposite to sides that are equal in length have






4. xw> yz






5. A¹






6. Have two equal sides and two equal angles formed by the equal sides and the unequal side.






7. V2/2- v2/2 - 1 (90-45-45)






8. ?






9. The point where the line crosses the x-axis - y will always = 0 in this case






10. x(y+z)






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






12. The length of a segment whose endpoints are (x1 -y1) and (x2 -y2)






13. Product of an even number and any other number is






14. V2






15. Volume= 4/3?r² surface area= 4?r²






16. 3-4-5






17. (x-y)(x-y) = (x-y)²






18. Distributive axiom - commutative axiom of addition and multiplication - associative axioms of addition and multiplication






19. 1/an






20. x/100






21. If an equation can be put into the form y= mx +b - then






22. Area= 1/2bh perimeter= a + b+ c hypotenuse= c²= b²+a²






23. Any integer is divisible by 4 - if






24. B>c+ d>e






25. Volume= bh or ?r²h surface area= 2?rh (w/o bases) or 2?r(h+r) with bases






26. The percent decrease from x to y ( y<x)






27. Wx<wy






28. x + y






29. Is - as - was - has - cost






30. x>0 and y<0 or x<0 and y >0






31. | |






32. x younger than y






33. C times as old as john

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34. If two lines are perpendicular - the slope of one is the






35. 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.






36. What % of m is n






37. The sum of the interior angles is






38. y<x






39. Any arc length is less than






40. 90°






41. 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






42. Two tangents to a circle from the same point outside of the circle are always






43. If two lines are parallel - the slope of one is






44. In a triangle - the greatest angles lies






45. All three sides and all three angles are equal






46. /100 (the ______ number over 100)






47. 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.






48. Sum of an odd and an even number is






49. All odd numbers end in the digits of






50. 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 -