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# ACT Prep Math

Question | Answer |
---|---|

even numbers | divide evenly by 2 |

odd numbers | can not be divided by 2, remainder |

digits | 1, ,2, 3, 4, 5, 6, 7, 8, 9, 10 are used to make other numbers |

prime numbers | cab be divided by 1 and itself |

absolute value | always even |

variables | the letters next to the numbers 2x |

coefficients | the numbers next to the letters 2x |

divisibility rules | any even number can be divided by 2 any number divisible by 3 if sum of its digits can be evenly divided by 3 any number is divisible by 5 its last digits are 0 or 5 any number is divisible by 6 if i it can be divided by its factors |

divisibility rules 2 | any number divisible by 8 if the last 3 digits is also divisible by 8 any number is divisible by 9 if the sum of its digits is divisible by 9 |

equal sign | = |

NOT equal sign | ≠ |

greater than, strict inequality | > |

less than, strict inequality | |

greater than inequality | ≥ |

less than inequality | ≤ |

parentheses | ( ) |

brackets | [ ] |

plus sign | + |

minus sign | - |

plus minus sign | plus sign over the minus sign |

asterick | * |

time sign | x |

multiplication dot | • |

division sign | ÷ |

division slash | / |

which questions should you answer first? | the easiest |

how many questions do you need to answer in 60 minutes | 60 |

if you are trying to get a 24 on the ACT math, how many do you have to answer correct | 39-40 |

what kind of math is on the test? | pre algebra, elementary algebra, intermediate algebra, coordinate geometry, plane geometry, and trigonometry |

if you do not know the answer to a question what should you do? | guess |

angle | formed by 2 lines or line segments which intersect a one point |

vertex | the point of intersections |

what are angles measured in? | degree or radian |

acute angle | measurement 0-90 degrees |

right angle | an angle whose measurement in degrees are exactly 90 |

obtuse angle | an angle whose degree measure is between 90-180 |

straight angle | an angle whose degree measure is exactly 180 |

perpendicular | lines are formed when the angle between two lines is 90 degrees |

supplementary | 2 angles= 180 degrees |

complementary | 2 angles= 90 degrees |

bisect | angle means to cut it in half |

integers | -3, -2, -1, 0, 1, 2, 3 |

rationals | fractions, that is, anything expressible as ration of integers |

real numbers | integers, rationals, radicals |

order of operations | PEMDAS. parentheses, exponents, multiplication, divide, add, subtract |

mean | average |

median | middle number |

mode | number that occurs most |

probability | # of desired outcomes over # of total outcomes |

area | 1/2bh |

circle area | πr squared |

circle circumference | 2πr |

full circle = how many degrees | 360º |

Created by:
mmomon12