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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^2)^4






2. (-1)^3 =






3. Define an 'expression'.






4. Which is greater? 27^(-4) or 9^(-8)






5. If Madagascar'S exports totaled 1.3 billion in 2009 - and 4% came from China - what was the value in millions of the country'S exports to China?






6. 5/6 in percent?






7. 2sqrt4 + sqrt4 =






8. What is the area of a regular hexagon with side 6?






9. 25^(1/2) or sqrt. 25 =






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






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






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






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






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






15. 1/6 in percent?






16. 3/8 in percent?






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






18. Define a 'Term' -






19. What are the irrational numbers?

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20. (12sqrt15) / (2sqrt5) =






21. What is an exterior angle?






22. How many sides does a hexagon have?






23. What is a tangent?






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






25. What does scientific notation mean?






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






27. Which quadrant is the lower left hand?






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






29. In similar hexagons - the ratio of the areas is 16:25. What is the ratio of their corresponding sides?






30. How many 3-digit positive integers are even and do not contain the digit 4?






31. What is the empty set?






32. 5/8 in percent?






33. 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?






34. What is a set with no members called?






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






36. What is the formula for computing simple interest?






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






38. 30< all primes<40






39. The slope of a line perpendicular to (a/b)?






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






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






42. What is the absolute value function?






43. What is the slope of a vertical line?

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44. Can you add sqrt 3 and sqrt 5?






45. Can you simplify sqrt72?






46. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






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






48. What is a parabola?






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






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






Can you answer 50 questions in 15 minutes?



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