## Test your basic knowledge |

# GRE Math: Common Errors

**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. 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?**

**2. A number is divisible by 9 if...**

**3. To multiply a number by 10^x**

**4. What is the order of operations?**

**5. The larger the absolute value of the slope...**

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

**7. What is the ratio of the sides of a 30-60-90 triangle?**

**8. In a triangle inscribed inside a circle - where the diameter is one side of the triangle - which angle is largest?**

**9. What is the sum of the angles of a triangle?**

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

**11. 7/8 in percent?**

**12. How to determine percent decrease?**

**13. What is the 'Range' of a series of numbers?**

**14. 25^(1/2) or sqrt. 25 =**

**15. 50 < all primes< 60**

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

**17. a^2 - b^2 =**

**18. Which quadrant is the lower left hand?**

**19. 10<all primes<20**

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

**21. What is a chord of a circle?**

**22. What is the absolute value function?**

**23. What is a major arc?**

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

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

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

**27. 1/6 in percent?**

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

**29. What is the name for a grouping of the members within a set based on a shared characteristic?**

**30. Is 0 even or odd?**

**31. If an inequality is multiplied or divided by a negative number....**

**32. What are the integers?**

**33. Suppose you have a set of n objects - and you want to select k of them - but the order doesn'T matter. What formula do you use to determine the number of combinations of n objects taken k at a time?**

**34. Evaluate and write as a mixed number: 2/7 - 3/21 + 2 & 4/14**

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

**36. Define a 'Term' -**

**37. What is a tangent?**

**38. Factor a^2 + 2ab + b^2**

**39. What is the name of set with a number of elements which cannot be counted?**

**40. The ratio of the areas of two similar polygons is ...**

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

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

**43. Describe the relationship between 3x^2 and 3(x - 1)^2**

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

**45. a^0 =**

**46. What is the percent formula?**

**47. 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**

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

**49. Pi is a ratio of what to what?**

**50. T or F? Given d -e &f =/ 0 - [(d^3)e(f^5)] / 2d(e^3) / [3(d^2)(e^3)(f^7)] / [6(e^5)(f^2)]?**