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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. For what values should the domain be restricted for the function f(x) = sqrt(x + 8)






2. Write 10 -843 X 10^7 in scientific notation






3. For similar triangles - the ratio of their corresponding sides is 2:3. What is the ratio of their areas?






4. Define a 'monomial'






5. Simplify 9^(1/2) X 4^3 X 2^(-6)?






6. When the 'a' in a parabola is positive....






7. What are 'Supplementary angles?'






8. To multiply a number by 10^x






9. Max and Min lengths for a side of a triangle?






10. Evaluate 4/11 + 11/12






11. What is a major arc?


12. How to find the circumference of a circle which circumscribes a square?






13. What is the set of elements found in both A and B?






14. 10<all primes<20






15. What are the rational numbers?






16. a^2 - b^2 =






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






18. Can you simplify sqrt72?






19. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






20. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. How many different people can get the three prizes?






21. What is the set of elements which can be found in either A or B?






22. Simplify (a^2 + b)^2 - (a^2 - b)^2






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






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






25. 3/8 in percent?






26. What is the ratio of the surface area of a cube with an edge of 10 to the surface area of a rectangular solid with dimensions 2 - 4 - and 6?






27. The ratio of the areas of two similar polygons is ...






28. Can you add sqrt 3 and sqrt 5?






29. Formula to find a circle'S circumference from its radius?






30. What is an isoceles triangle?






31. a^2 - b^2






32. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






33. Employee X is paid 19.50 per hour no matter how many a week. Employee Y earns 18 for the first 40 and 1.5 the hourly wage for every hour after that. If both earned the same amount and worked the same in one week - how many did each work?






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






35. Factor a^2 + 2ab + b^2






36. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






37. What are the integers?






38. What is a tangent?






39. 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?






40. Suppose you have a set of n objects - and you want to select k of them - but the order doesn'T matter. What formula do you use to determine the number of combinations of n objects taken k at a time?






41. 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






42. Ratio of ages of Anna and Emma is 3:5 and of Emma and Nicolas is 3:5. What is the ratio of Anna to Nicholas' ages?






43. x^6 / x^3






44. What is the percent formula?






45. Define a 'Term' -






46. Is 0 even or odd?






47. Whats the difference between factors and multiples?






48. Reduce: 4.8 : 0.8 : 1.6






49. a^2 + 2ab + b^2






50. How to determine percent increase?