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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. x^6 / x^3






2. To multiply a number by 10^x






3. x^4 + x^7 =






4. Is 0 even or odd?






5. Evaluate 4/11 + 11/12






6. Legs 5 - 12. Hypotenuse?






7. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






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






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






10. The larger the absolute value of the slope...






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






12. 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?






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






14. What is the slope of a vertical line?

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15. 8.84 / 5.2






16. What is the empty set?






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






18. Order of quadrants:






19. 2sqrt4 + sqrt4 =






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






21. What is the 'Restricted domain of a function'?






22. What does scientific notation mean?






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






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






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






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






27. What are 'Supplementary angles?'






28. Length of an arc of a circle?






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






30. x^2 = 9. What is the value of x?






31. 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)?






32. (a^-1)/a^5






33. Factor x^2 - xy + x.






34. Simplify the expression (p^2 - q^2)/ -5(q - p)






35. What is a central angle?






36. 10^6 has how many zeroes?






37. Which quadrant is the lower left hand?






38. 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?






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






40. 70 < all primes< 80






41. What is a chord of a circle?






42. 25^(1/2) or sqrt. 25 =






43. What are the integers?






44. What is the measure of an exterior angle of a regular pentagon?






45. 40 < all primes<50






46. 1/2 divided by 3/7 is the same as






47. Area of a triangle?






48. 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?






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






50. What is a tangent?