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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. Evaluate 3& 2/7 / 1/3






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






3. Factor x^2 - xy + x.






4. 5 bakeries sell an average of 300 muffins per bakery per day. If 2 stop making muffins but the total muffins sold stays the same - what is the average of muffins per bakery sold among the remaining?






5. What are the rational numbers?






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






7. How many digits are there between the decimal point and the first even digit in the decimal equivalent of 1/[(2^8)(5^3)]






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






9. If 10800 is invested at a simple interest rate of 4% - what is the value of the investment after 18 months?






10. How to determine percent decrease?






11. If the two sides of a triangle are unequal then the longer side...






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






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






14. 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))?






15. (12sqrt15) / (2sqrt5) =






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






17. (-1)^2 =






18. Define an 'expression'.






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






20. What is a tangent?






21. If 4500 is invested at a simple interest rate of 6% - what is the value of the investment after 10 months?






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






23. How to find the diagonal of a rectangular solid?






24. a^2 + 2ab + b^2






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






26. A number is divisible by 3 if ...






27. What is a parabola?






28. Volume for a cylinder?






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






30. What is the order of operations?






31. Can you simplify sqrt72?






32. A number is divisible by 6 if...






33. How many sides does a hexagon have?






34. Which quadrant is the lower left hand?






35. If an inequality is multiplied or divided by a negative number....






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






37. Evaluate 4/11 + 11/12






38. 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?






39. What is the 'domain' of a function?






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






41. x^(-y)=






42. Suppose that the graph of f(x) is the result of sliding the graph of y=2x^2 down 3 units of spaces. What is the new equation?






43. What transformation occurs if point C is reflected over the x-axis and then the y-axis?






44. 50 < all primes< 60






45. What is an exterior angle?






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






47. What are the roots of the quadrinomial x^2 + 2x + 1?






48. Circumference of a circle?






49. What are the members or elements of a set?






50. How many multiples does a given number have?