Divisibility Rules

A number is divisible by:
-2 if the number is even
-3 if the sum of its digits is divisible by 3
-4 if the number represented by the last 2 digits is divisible by 4
-5 if the last digit is 0 or 5
-6 if the number is divisible by 2 and 3
-8 if the number represented by the last 3 digits is divisible by 8
-9 if the sum of the digits is divisible by 9
-10 if the last digit is 0

Integer Tip
-8² = (-64)
(-8)² = (+64)  --->  (-8) x (-8) = (+64)

When a number has an exponent with it, if the exponent is even, the result is positive.
If the exponent is odd, the result is negative.

EX.
(-3)³ --> (-3) x (-3) x (-3) = (-27)

² ----------

Labels: Lessons

Hello, my name is Sohyun Kim, and I am in grade 9. This site is for my math summative project, so no hateful comments please. I generally like to read, draw, read manga, and watch anime in my spare time.
Normal | Bold | Strikeout | Italic | Underline | Link | big | small

Polynomials: Algebraic expressions made up of terms
Monomial: 1 term
Binomial: 2 terms
Trinomial: 3 terms
Terms: Made up of a coefficient and variable(s)
Power: Product of identical factors and consists of 2 parts- exponent and base. Coefficient: ----
Variable: ----
Constant/constant term: A term with no variable
Hypothesis: A theory or statement that is either true or false
Statistics: The collection, organization, and analysis of numerical data
Primary Data: Data that comes from experiments and surveys done by researchers
Secondary Data: Data that already exists- comes from sources such as the internet, magazines, and Statistics Canada
Interpolation: Prediction involving a point within the set of data
Extrapolation: Prediction involving a point outside the set of data
Linear Relation: Relation between 2 variables, forms a straight line
Non-Linear Relation: Relation between 2 variables, does NOT form a straight line
Curve of best fit: Curve that comes closest to the points of a non-linear relation
First Differences: -----
Slope: The steepness of a line- ratio of the rise to the run between both points
Direct Variation: A relationship between 2 variables in which one variable is a constant multiple of the other
Partial Variation: When a relationship between 2 variables have both a fixed and variable amount
Continued -HERE-

Polynomials / Equations / Relations / Linear Relations / Analytic Geometry / Measurement / Helpful Tips /