Sets/factors/lines Flashcards
What is a set?
A set is an collection of well define objects (example members of your family)
What is an subset?
A subset is an set in a set example 1,3 is an subset of 1,2,3,4,5,6
What are the numbers/letters in the set represented as?
The numbers and letters in a set are represented by the word Element
What is an cardinal numbers?
An cardinal number is the numbers of elements in a set the symbol is an #
What does an null set mean?
A null set is the meaning of an empty set
What is an union (vent diagram example)
A union is like both of the circled so if they ask you to shade the union shade both of the circles in the vent diagram.
What is an intersection? ( vent diagram wise)
An intersection is the middle of the set so like the middle of the circle if set a and set b have similar numbers it goes in the intersection.
What is the meaning of A universal set?
The universal set is everything so,if they tell you to list the elements in the universal set list everything
What does set difference mean?
Set difference is like the differences between the set an example is 123 and 1234 what’s the set difference? The set difference is 4 the symbol for this is /
What does the n and u symbol represent
The n symbol represents the intersection the u symbol represents an union
What is an prime number? And a composite
A prime number is a number you can divide by 1 or itself and an example is 2,3,5,711 and a composite number is an number you can divide more than twice or twice like 4,6,8,10 (OR NUMBERS THAT HAVE FACTORS)
What is an rational number?
A rational number is an number written as an fraction like 1/4 or 2/5
What are real numbers?
Real numbers are all numbers on the number line integers,rational and irrational numbers they are all real numbers
What are irrational numbers.
Irrational numbers are numbers written as an decimal like 0.25
What are rational/integers/natural numbers/real numbers represented on the number line
Real numbers is represented by Q rational numbers are represented by z and natural numbers are repersented as N
What is an integer
Integers are all numbers that includes 0 negative and positive numbers but no fractions or decimals
How do you find the highest common factor? Example 12 and 15 ?
To find the highest common factor you have to list the factors of the numbers but it has to be the highest one in common such as 12- 1,2,3,4,6,12 and for 15 it’s 1,3,5, so the highest common factor is 3 
How do you find the lowest common multiple? Example 20 and 24
To find the lowest common multiple yapping list the multiples of two numbers such as 20 and 24 20- 20 20 40 60 80 100 120 140 160 180 200, 24 , 24 , 48 , 72 , 96 , 120 the lowest. Common multiple is 120
How do you find the prime factor of 18
To find the prime factor use this formula. 18 = 2 divided by 9 2 is a prime number so we can leave it so what divided by 9 = a prime number? 3 and 3 and they are both prime numbers so 3 times 3 times 2
How do you find the chance of something example theirs 12 people altogether and they pick 6 and you have to put it in an fraction,percentage,decimal
So the example is six also 6/12 simplify by 6 1/2 witch is 50% with is 0.50
What is an plane in lines?
A plane is a flat surface that goes on forever in every direction
What is an point/line
A line of a point that exstends to infinity in both directions
What is an ray?
A ray is an line that starts at one point and continues to infinity
What is an line segment?
A line segment is a line that starts at one point and ends at another point
What is an midpoint in a line segment?
A midpoint in the line segment is the point located in the middle and is also divided by the other two points
