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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. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






2. 10<all primes<20






3. How to find the area of a sector?






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






5. What is a piecewise equation?






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






7. 1/8 in percent?






8. Number of degrees in a triangle






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






10. 8.84 / 5.2






11. Formula for the area of a sector of a circle?






12. What is the formula for computing simple interest?






13. 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?






14. 5/8 in percent?






15. A number is divisible by 4 is...






16. What is the empty set?






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






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






19. What is the 'Range' of a function?






20. What percent of 40 is 22?






21. Can you add sqrt 3 and sqrt 5?






22. Circumference of a circle?






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






24. What are congruent triangles?






25. What are the irrational numbers?

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






27. 5x^2 - 35x -55 = 0






28. For what values should the domain be restricted for the function f(x) = sqrt(x + 8)






29. What is the ratio of the surface area of a cube with an edge of 10 to the surface area of a rectangular solid with dimensions 2 - 4 - and 6?






30. Evaluate 4/11 + 11/12






31. What does scientific notation mean?






32. 1/6 in percent?






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






34. What is a parabola?






35. 0^0






36. 20<all primes<30






37. What is a set with no members called?






38. What is a subset?






39. sqrt 2(sqrt 6)=






40. (-1)^2 =






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






42. Whats the difference between factors and multiples?






43. If r - t - s & u are distinct - consecutive prime numbers - less than 31 - which of the following could be an average of them (4 - 4.25 - 6 - 9 - 24 - 22 - 24)






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






45. 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?






46. 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?






47. Legs 6 - 8. Hypotenuse?






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






49. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






50. To convert a decimal to a percent...