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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. What is the 'union' of A and B?






2. Evaluate 4/11 + 11/12






3. What is the surface area of a cylinder with radius 5 and height 8?






4. 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?






5. What are congruent triangles?






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






7. A triangle is inscribed in a semi circle with legs 5 and 12. What is the circumfermence of the semicircle?






8. What is a chord of a circle?






9. Area of a triangle?






10. Describe the relationship between 3x^2 and 3(x - 1)^2






11. Describe the relationship between the graphs of x^2 and (1/2)x^2






12. 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?






13. What is a piecewise equation?






14. How to determine percent decrease?






15. How many sides does a hexagon have?






16. Volume for a cylinder?






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






18. What is a major arc?

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19. Suppose that the graph of f(x) is the result of stretching y=x + 5 away from the x-axis by a factor of 2. What is the new equation for the graph f(x)?






20. Hector invested $6000. Part was invested in account with 9% simple annual interest - and the rest in account with 7% simple annual interest. If he earned $490 in the first year of these investments - how much did he invest in each account?






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






22. 1/8 in percent?






23. A number is divisible by 9 if...






24. Evaluate 3& 2/7 / 1/3






25. When does a function automatically have a restricted domain (2)?






26. Circumference of a circle?






27. Which quadrant is the lower left hand?






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






29. If a=-1 and b=3 - what is the value of (4(a^3)(b^2) - 12(a^2)(b^5)) / (16(a^3)(b^2))?






30. What is the empty set?






31. If r - t - s & u are distinct - consecutive prime numbers - less than 31 - which of the following could be an average of them (4 - 4.25 - 6 - 9 - 24 - 22 - 24)






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






33. What is a tangent?






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






35. (12sqrt15) / (2sqrt5) =






36. Factor x^2 - xy + x.






37. In a triangle inscribed inside a circle - where the diameter is one side of the triangle - which angle is largest?






38. What is the name of set with a number of elements which cannot be counted?






39. What is the graph of f(x) shifted downward c units or spaces?






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






41. 7/8 in percent?






42. Formula of rectangle where l increases by 20% and w decreases by 20%






43. What is a minor arc?

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44. 40 < all primes<50






45. What is the common monomial factor in the expression 4(c^3)d - (c^2)(d^2) + 2cd?






46. Whats the difference between factors and multiples?






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






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






49. To convert a decimal to a percent...






50. What does the graph x^2 + y^2 = 64 look like?