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






2. (-1)^3 =






3. 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?






4. x^4 + x^7 =






5. What is the order of operations?






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






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






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






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






10. Define an 'expression'.






11. 40 < all primes<50






12. Suppose that the graph of f(x) is the result of stretching y=x + 5 away from the x-axis by a factor of 2. What is the new equation for the graph f(x)?






13. (12sqrt15) / (2sqrt5) =






14. 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?






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






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






17. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. How many different people can get the three prizes?






18. 2sqrt4 + sqrt4 =






19. What are the smallest three prime numbers greater than 65?






20. What is the percent formula?






21. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






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






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






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






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






26. Area of a triangle?






27. a^2 + 2ab + b^2






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






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






30. a^2 - b^2






31. What is a parabola?






32. Solve the quadratic equation ax^2 + bx + c= 0






33. Surface area for a cylinder?






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






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






36. What is the surface area of a cylinder with radius 5 and height 8?






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






38. x^(-y)=






39. Define a 'Term' -






40. a^2 - b^2 =






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






42. A number is divisible by 4 is...






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






44. How to determine percent increase?






45. How to find the area of a sector?






46. What is the formula for computing simple interest?






47. Which quadrant is the lower left hand?






48. (6sqrt3) x (2sqrt5) =






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






50. 1/8 in percent?