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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 ratio of the sides of a 30-60-90 triangle?






2. What is an arc of a circle?






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






4. a^0 =






5. A brick with dimensions 10. 15 and 25 weighs 1.5 kg. A second brick (same density) has dimensions 12 - 18 - and 30. What is the weight of the second brick?






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






7. How to determine percent decrease?






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






9. (x^2)^4






10. What is it called when a point is reflected to the quadrant opposite it (i.e. I to III or II to IV)?






11. What are 'Supplementary angles?'






12. Formula to calculate arc length?






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






14. What is an isoceles triangle?






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






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






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






18. What is the absolute value function?






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






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






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






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






23. How to determine percent increase?






24. Whats the difference between factors and multiples?






25. A number is divisible by 4 is...






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






27. 40 < all primes<50






28. Evaluate 4/11 + 11/12






29. What are complementary angles?






30. What is the slope of a vertical line?

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






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






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






34. 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?






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






36. What is the intersection of A and B?






37. 1/2 divided by 3/7 is the same as






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






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






40. Define an 'expression'.






41. 20<all primes<30






42. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






43. Volume for a cylinder?






44. 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?






45. Formula for the area of a circle?






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






47. 7/8 in percent?






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






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






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







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