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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. 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?






2. (x^2)^4






3. 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)?






4. How to find the circumference of a circle which circumscribes a square?






5. For similar triangles - the ratio of their corresponding sides is 2:3. What is the ratio of their areas?






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






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






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






9. Formula for the area of a circle?






10. What is an arc of a circle?






11. Simplify the expression (p^2 - q^2)/ -5(q - p)






12. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






13. The slope of a line perpendicular to (a/b)?






14. 0^0






15. If the 80th percentile of the measurements is 72degrees - about how many measurments are between 69 degrees and 72 degrees? Round your answer to the nearest tenth






16. What is the 'domain' of a function?






17. Circumference of a circle?






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






19. (6sqrt3) x (2sqrt5) =






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






21. 4.809 X 10^7 =






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






23. Factor x^2 - xy + x.






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






25. A triangle is inscribed in a semi circle with legs 5 and 12. What is the circumfermence of the semicircle?






26. Convert 0.7% to a fraction.






27. (12sqrt15) / (2sqrt5) =






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






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






30. Whats the difference between factors and multiples?






31. What does scientific notation mean?






32. What is the intersection of A and B?






33. Which quadrant is the upper left hand?






34. 10<all primes<20






35. How to find the diagonal of a rectangular solid?






36. 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?






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






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






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






40. (-1)^2 =






41. How to determine percent decrease?






42. 50 < all primes< 60






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






44. Legs: 3 - 4. Hypotenuse?






45. 25^(1/2) or sqrt. 25 =






46. What percent of 40 is 22?






47. 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?






48. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






49. Simplify (a^2 + b)^2 - (a^2 - b)^2






50. Area of a triangle?







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