Test your basic knowledge |

Important Math Facts

Subject : math
  • 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. Two angles are ___________ if the sum of their measures is 90°.

2. The ______________ are the numbers of pieces of data that can represent the whole set of data. These common measures of central tendency are mean - median - and mode.

3. A _______ is the comparison of two numbers by division.

4. The __________ of a solid is the total area of its exterior surfaces.

5. To ____________ - replace the divisor with its reciprocal and then multiply to get your answer.

6. A _________ is a symbol - usually a letter - used to represent a number.

7. The _________ states that multiplying a sum by a number is the same as multiplying each addend by that number and then adding the two products. For example - 3(8 + 2) = (3 x 8) + (3 x 2).

8. A _________ is a randomly-selected group that is used to represent a whole population.

9. ______________ are two events in which either one or the other must take place - but they cannot both happen at the same time. The sum of their probabilities is one.

10. Similar figures have the same shape but different sizes. The symbol ~ means _________ .

11. Instead of writing large numbers with all the zeros - you can use _________ . For example - 4 -250 -000 -000 = 4.25 x 10⁹.

12. The symbol < is read as ________ .

13. _________ - _________ - and_______may be written by first writing each one as a fraction with a denominator of 100.

14. In a __________ - an object slides from one position to another without changing its size or shape.

15. The _________ of an integer is the distance of the integer from zero.

16. To ______________ - if the denominators are unlike - write equivalent fractions with a common denominator. Subtract the fractions first - and rename if necessary. Then subtract the whole numbers. Simplify if possible.

17. To __________ an algebraic expression means to substitute a value for the variables and apply the rules for order of operation.

18. A _______ is a ratio that compares a number to 100.

19. A _________ has six rectangular faces. To find the surface area - find the sum of the areas of the six faces.

20. The symbol ______ means percent.

21. Use number lines to ________ two decimals.

22. The surface area of a __________ is the sum of the areas of two circles and a rectangle.

23. The set of ________ consists of the positive whole numbers - zero - and the opposites of the positive whole numbers.

24. The symbol > is read as _________.

25. The ___________ of a circle is equal to π times its diameter or π times twice its radius. C = π d or C = 2 π r.

26. A ___________ is a transformation that turns a line or shape around a fixed point.

27. The opposite of a positive integer is a ________ .

28. To add mixed numbers with unlike denominators - write equivalent fractions with a ___________ . Add the whole numbers and add the fractions.

29. The ________ of an angle is the common endpoint of the rays forming the angle.

30. The symbol ≤ is read as __________ .

31. An ___________ is a combination of numbers - variables - and operations.

32. A diagram used to show the total number of possible outcomes in a probability experiment is called a _____________.

33. The symbol ≥ is read as ______________.

34. ___________ is a number that can be written using an exponent. For example - 3² means three to the second power.

35. The _________ of a circle is twice the length of the radius.

36. A _________ is a special kind of bar graph that shows frequency of data.

37. The ________ is used to represent the ratio of distance on the map to the actual distance.

38. An approximation of pi is 3.14 - or _______ .

39. If a figure can be divided in half by a line so that the two halves match each other - the figure is __________ .

40. Prime factorization can be written using ________ . For example - 2 x 2 x 3 = 2² x 3

41. A ___________ is a proportion with one fraction with a denominator of 1.

42. To ___________ - multiply the numerators and then multiply the denominators. Write the product in lowest terms.

43. _________ integers are the same distance from zero in opposite directions on the number line.

44. In a power - the number of times the base is used as a factor is the ________ . In 5³ - the exponent is 3.

45. An ________ is a mathematical sentence that contains the equal sign.

46. When you add or subtract _________ that have the same or like denominators - you only add or subtract the numerators. The denominator stays the same.

47. Both addition and multiplication are _________ . This means that order doesnft change the sum or product.

48. A figure that can be rotated 180° about a point so that it matches the original figure has ______ .

49. Two angles are ___________ if the sum of their measures is 180°.

50. To express a ______ as a _______ - rewrite the percent as a fraction with a denominator of 100 - and then express the fraction as a decimal.