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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 side length of an equilateral triangle with altitude 6?






2. 5x^2 - 35x -55 = 0






3. Can you simplify sqrt72?






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






5. a^0 =






6. What is a central angle?






7. The objects in a set are called two names:






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






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






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






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






12. (6sqrt3) x (2sqrt5) =






13. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






14. 413.03 x 10^(-4) =






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






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






17. Simplify the expression [(b^2 - c^2) / (b - c)]






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






19. How many multiples does a given number have?






20. Volume for a cylinder?






21. 8.84 / 5.2






22. a^2 - b^2






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






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






25. Can the output value of a function have more than one input value?






26. What is an arc of a circle?






27. What is the order of operations?






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






29. a^2 - b^2 =






30. 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)?






31. What are the integers?






32. 1/6 in percent?






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






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






35. 3/8 in percent?






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






37. Define an 'expression'.






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






39. What are the irrational numbers?

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40. 1/2 divided by 3/7 is the same as






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






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






43. What is the slope of a horizontal line?






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






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






46. 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?






47. What is the 'Solution' for a set of inequalities.






48. A company places a 6-symbol code on each product. The code consists of the letter T - followed by 3 numerical digits - and then 2 consonants (Y is a conson). How many codes are possible?






49. Evaluate 4/11 + 11/12






50. 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?