Divisibility/Divisible

Divisible means when a number can be divided by another number, 

With no remainders or decimals.

Divisibility rules

1- All numbers

2- Even numbers 

3- Sum of the digits is divisible by 3

4- Divisible by 2 Twice

5- Ends in a 0 or 5

6- Divisible by 2 And 3

8- Divisible bye 2 thrice (three times)

9- Sum of he digits is 9

10- ends in 0 

Circle Formulas:

C=πd this is used to measure the circumference of a circle 
C=2πr twice the radius is the diameter 
A=πr2 this is used to measure the area
d=2r this is used to measure the diameter 

Intersecting

2 lines that Intersect "Cross" at any point

Parallel Lines

2 lines on the same plane that NEVER meet, Same distance apart

Perpendicular

2 lines that meet at 90 degrees angle 

Numerical Coefficient

A number that multiplies the variable

Eg. 2t

Constant

A number that does not change and it increases or decreases the value of an expression

Value

A known or calculated amount

Expression

Any single number or variable,or combination of operations (-,+,x,÷) involving numbers and variables
Eg. 5,n,8t,x+1,2y,-7

Variable

A letter that represents an unknown number
Eg. x,a,n

How To Do BEDMAS

B is for Brackets
E is for Exponents
D is for Division
M is for Multiplication
A is for Addition
S is for Subtraction

Multiple -

The product of any given number and natural number like 1,2,3 ...

Eg. some multiple of 3 are: 3,6,9,12,15,18

multiple is just skip counting

Common Denominator-

a common multiple of the Denominator of a set of fraction

Eg.a common Denominator for 1/4 and 1/6 is 12 because a common multiple of 4 and 6 is 12

1/4= /12

1/6= /12

Divisible rule for 1

All numbers are divisible by 1
eg. 5÷1=5
eg. 000 ÷ 0= 1

order of operations

B- Brackets

E- Exponents

D- Division

M- Multiplication

A- Additions

S- Subtractions

The divisions,multiplications,additions and subtractions goes from left to right