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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 measure of an exterior angle of a regular pentagon?






2. The ratio of the areas of two similar polygons is ...






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






4. Evaluate 3& 2/7 / 1/3






5. Surface area for a cylinder?






6. 4.809 X 10^7 =






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






8. If r - t - s & u are distinct - consecutive prime numbers - less than 31 - which of the following could be an average of them (4 - 4.25 - 6 - 9 - 24 - 22 - 24)






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






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






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






12. Can you subtract 3sqrt4 from sqrt4?






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






14. What is the intersection of A and B?






15. What is the third quartile of the following data set: 44 - 58 - 63 - 63 - 68 - 70 - 82






16. 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?






17. Can the input value of a function have more than one output value (i.e. x: y - y1)?






18. Define a 'monomial'






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






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






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






22. Formula for the area of a circle?






23. What are the irrational numbers?

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24. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. How many different people can get the three prizes?






25. What is a central angle?






26. What are the rational numbers?






27. 40 < all primes<50






28. What are the integers?






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






30. 60 < all primes <70






31. What is the order of operations?






32. Employee X is paid 19.50 per hour no matter how many a week. Employee Y earns 18 for the first 40 and 1.5 the hourly wage for every hour after that. If both earned the same amount and worked the same in one week - how many did each work?






33. Legs 5 - 12. Hypotenuse?






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






35. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






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






37. Length of an arc of a circle?






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






39. What is the ratio of the sides of an isosceles right triangle?






40. What is a finite set?






41. What are the real numbers?






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






43. What is the 'Solution' for a system of linear equations?






44. x^4 + x^7 =






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






46. Legs 6 - 8. Hypotenuse?






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






48. What are the smallest three prime numbers greater than 65?






49. In a triangle where the two legs are 4 and 3 - what is the value of a line directly intersecting the middle coming from the meeting point of the two legs?






50. If the 80th percentile of the measurements is 72degrees - about how many measurments are between 69 degrees and 72 degrees? Round your answer to the nearest tenth