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






2. 413.03 x 10^(-4) =






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






4. (12sqrt15) / (2sqrt5) =






5. sqrt 2(sqrt 6)=






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






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






8. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






9. What is a central angle?






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






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






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






13. Nine coins are tossed simultaneously. In how many of the outcomes will the fourth coin tossed show heads?






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






15. Describe the relationship between the graphs of x^2 and (1/2)x^2






16. What is the sum of the angles of a triangle?






17. 70 < all primes< 80






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






19. From a box of 12 candles - you are to remove 5. How many different sets of 5 candles could you remove?






20. x^(-y)=






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






22. x^4 + x^7 =






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






24. 1/2 divided by 3/7 is the same as






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






26. What is a parabola?






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






28. Can you simplify sqrt72?






29. How to determine percent decrease?






30. What is an isoceles triangle?






31. What is the common monomial factor in the expression 4(c^3)d - (c^2)(d^2) + 2cd?






32. How many digits are there between the decimal point and the first even digit in the decimal equivalent of 1/[(2^8)(5^3)]






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






34. What is the set of elements found in both A and B?






35. 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?






36. Suppose that the graph of f(x) is the result of sliding the graph of y=2x^2 down 3 units of spaces. What is the new equation?






37. What is a tangent?






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






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






40. 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?






41. What percent of 40 is 22?






42. 10<all primes<20






43. What is the intersection of A and B?






44. (-1)^2 =






45. Hector invested $6000. Part was invested in account with 9% simple annual interest - and the rest in account with 7% simple annual interest. If he earned $490 in the first year of these investments - how much did he invest in each account?






46. Which is greater? 64^5 or 16^8






47. A number is divisible by 4 is...






48. What is a set with no members called?






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






50. Formula for the area of a circle?