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GRE Math: Common Errors

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. How to find the diagonal of a rectangular solid?






2. 5/6 in percent?






3. What is the 'Range' of a series of numbers?






4. What does the graph (x+2)^2 + (y+2)^2 = 9 look like?






5. Formula for the area of a sector of a circle?






6. a^2 + 2ab + b^2






7. In similar hexagons - the ratio of the areas is 16:25. What is the ratio of their corresponding sides?






8. Legs: 3 - 4. Hypotenuse?






9. (-1)^2 =






10. What is the percent formula?






11. What is an isoceles triangle?






12. What is the ratio of the sides of a 30-60-90 triangle?






13. What is an exterior angle?






14. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






15. Formula to find a circle'S circumference from its diameter?






16. What is the slope of a horizontal line?






17. A cylinder has surface area 22pi. If the cylinder has a height of 10 - what is its radius?






18. a^2 - 2ab + b^2






19. If you have a set of n objects - but you only want to order k of them - what formula do you use to determine the number of permutations?






20. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






21. Solve the quadratic equation ax^2 + bx + c= 0






22. Factor x^2 - xy + x.






23. Number of degrees in a triangle






24. When the 'a' in the parabola is negative...






25. From a box of 12 candles - you are to remove 5. How many different sets of 5 candles could you remove?






26. To multiply a number by 10^x






27. 3/8 in percent?






28. 413.03 x 10^(-4) =






29. 50 < all primes< 60






30. 6w^2 - w - 15 = 0






31. Formula for the area of a circle?






32. If the 80th percentile of the measurements is 72degrees - about how many measurments are between 69 degrees and 72 degrees? Round your answer to the nearest tenth






33. The perimeter of a square is 48 inches. The length of its diagonal is:






34. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






35. 5x^2 - 35x -55 = 0






36. 60 < all primes <70






37. Evaluate (4^3)^2






38. What is a major arc?

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39. What is the sum of the angles of a triangle?






40. 1/6 in percent?






41. What is the side length of an equilateral triangle with altitude 6?






42. (-1)^3 =






43. Can you subtract 3sqrt4 from sqrt4?






44. Find the surface area of a cylinder with radius 3 and height 12.






45. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. In how many ways can the judges award the 3 prizes?






46. Length of an arc of a circle?






47. 0^0






48. The four angles around a point measure y - 2y - 35 and 55 respectively. What is the value of y?






49. Nine coins are tossed simultaneously. In how many of the outcomes will the fourth coin tossed show heads?






50. a^2 - b^2