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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. Whats the difference between factors and multiples?






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






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






5. What is the absolute value function?






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






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






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






9. a^2 - b^2 =






10. Factor x^2 - xy + x.






11. What is a central angle?






12. What is an arc of a circle?






13. Which quadrant is the lower left hand?






14. Which quadrant is the upper right hand?






15. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






16. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






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






18. 5/6 in percent?






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






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






21. What are the integers?






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






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






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






25. What is the percent formula?






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






27. x^(-y)=






28. What are 'Supplementary angles?'






29. Evaluate and write as a mixed number: 2/7 - 3/21 + 2 & 4/14






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






31. 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?






32. To multiply a number by 10^x






33. Can you add sqrt 3 and sqrt 5?






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






35. 0^0






36. (6sqrt3) x (2sqrt5) =






37. 413.03 x 10^(-4) =






38. Which quadrant is the upper left hand?






39. What is the coefficient of the x^2 term in the product of (x + 1)(x + 2)(x -1)?






40. A brick with dimensions 10. 15 and 25 weighs 1.5 kg. A second brick (same density) has dimensions 12 - 18 - and 30. What is the weight of the second brick?






41. What is the maximum value for the function g(x) = (-2x^2) -1?






42. 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?






43. What is the 'Range' of a function?






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






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






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






47. 10^6 has how many zeroes?






48. 40 < all primes<50






49. Legs 6 - 8. Hypotenuse?






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