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GRE Math: Common Errors

Subjects : gre, math
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. For similar triangles - the ratio of their corresponding sides is 2:3. What is the ratio of their areas?

2. Factor a^2 + 2ab + b^2

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

4. What transformation occurs if point C is reflected over the x-axis and then the y-axis?

5. What are the integers?

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

7. To multiply a number by 10^x

8. What is the side length of an equilateral triangle with altitude 6?

9. What is the formula for computing simple interest?

10. To convert a decimal to a percent...

11. Which quadrant is the lower left hand?

12. What is a set with no members called?

13. 70 < all primes< 80

14. 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?

15. To convert a percent to a fraction....

16. Legs 5 - 12. Hypotenuse?

17. 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?

18. If a=-1 and b=3 - what is the value of (4(a^3)(b^2) - 12(a^2)(b^5)) / (16(a^3)(b^2))?

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

20. 60 < all primes <70

21. Which quandrant is the lower right hand?

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

23. 8.84 / 5.2

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

25. In a regular polygon with n sides - the formula for the sum of interior angles

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

27. 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?

28. Pi is a ratio of what to what?

29. 2sqrt4 + sqrt4 =

30. Evaluate 4/11 + 11/12

31. Legs: 3 - 4. Hypotenuse?

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

33. If 8 schools are in a conference - how many games are played if each team plays each other exactly once?

34. Reduce: 4.8 : 0.8 : 1.6

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

36. What is the name for a grouping of the members within a set based on a shared characteristic?

37. What are the members or elements of a set?

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

39. What are the irrational numbers?

40. 1/8 in percent?

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

42. 30< all primes<40

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

44. Convert 0.7% to a fraction.

45. What does scientific notation mean?

46. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?

47. x^(-y)=

48. (-1)^2 =

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

50. What is the formula for compounded interest?