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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
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