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

2. If an inequality is multiplied or divided by a negative number....

3. What is the name of set with a number of elements which cannot be counted?

4. 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?

6. What are complementary angles?

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

8. 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?

9. How to determine percent decrease?

10. 5 bakeries sell an average of 300 muffins per bakery per day. If 2 stop making muffins but the total muffins sold stays the same - what is the average of muffins per bakery sold among the remaining?

11. P and r are factors of 100. What is greater - pr or 100?

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

13. a^2 - b^2

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

15. If you have a set of n objects - but you only want to order k of them - what formula do you use to determine the number of permutations?

16. What are the rational numbers?

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

18. What is the order of operations?

19. 60 < all primes <70

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

21. 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?

22. 6w^2 - w - 15 = 0

23. 2sqrt4 + sqrt4 =

24. a^2 + 2ab + b^2

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

26. Which quadrant is the lower left hand?

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

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

29. Define a 'monomial'

30. (-1)^3 =

31. (6sqrt3) x (2sqrt5) =

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

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

34. 3/8 in percent?

35. 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

36. What number between 70 & 75 - inclusive - has the greatest number of factors?

37. x^(-y)=

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

39. What are the irrational numbers?

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

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

42. What is the absolute value function?

43. What is a parabola?

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

45. What is the slope of a horizontal line?

46. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?

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

48. What is a set with no members called?

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

50. Reduce: 4.8 : 0.8 : 1.6