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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 are congruent triangles?






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






3. How to determine percent increase?






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






5. (-1)^3 =






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






7. 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?






8. Can you subtract 3sqrt4 from sqrt4?






9. 70 < all primes< 80






10. Legs: 3 - 4. Hypotenuse?






11. Convert 0.7% to a fraction.






12. What is an isoceles triangle?






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






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






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






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






17. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. In how many ways can the judges award the 3 prizes?






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






19. What are 'Supplementary angles?'






20. If Madagascar'S exports totaled 1.3 billion in 2009 - and 4% came from China - what was the value in millions of the country'S exports to China?






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






23. How to find the area of a sector?






24. What is the formula for compounded interest?






25. What is the order of operations?






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






27. What is the maximum value for the function g(x) = (-2x^2) -1?






28. What is the percent formula?






29. 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?






30. What are the integers?






31. Which quadrant is the upper right hand?






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






33. 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?






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






35. sqrt 2(sqrt 6)=






36. 5x^2 - 35x -55 = 0






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






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






39. 413.03 x 10^(-4) =






40. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






41. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






42. 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?






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






44. Which quandrant is the lower right hand?






45. What is a tangent?






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






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






48. 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?






49. What is a subset?






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







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