Sets of Numbers Flashcards
Distinguish among sets of numbers
What is an irrational number
An irrational number is a number that can’t be represented as a fraction or ratio where the numerator and denominator are both integers.eg. a reccuring number
What is a rational number
It is a number that can be represented in a fraction p/q where p and q are both integers
What is a natural number
Counting numbers starting from 1
What is a whole number
All natural numbers plus 0
What is an integer
Positive and negative whole numbers and 0
What is a real number
A real number is the set of rational and irrational numbers
Significant Figures vs decimal places
Significant figures: Count from the first non 0 digit starting from the left
Decimal places: count the number of places to the right from the decimal point
What is Standard Form or Scientific Notation
Standard form is a number from 1 to 9 ×10 to a -power for small numbers or to a + power for large numbers
Inclusion Relations
https://www.tes.com/lessons/AYggOQP1tt11mw/rational-numbers
Even vs Odd numbers
Even numbers can be exactly divided by 2 but
Odd numbers always leave a remainder
No number can be both even and odd
Prime vs Composite Numbers
Prime Numbers are divisible by themselves and 1 only.
- 1 is not a prime number
- 2 is the only even prime number.
Composite numbers are divisible by 3 or more numbers
Factors vs Multiples
Factors divide exactly into a given number
Multiples can be divided exactly by the given number
Factors are less than or equal to the number
Multiples are greater than or equal to the number
Prime factors are the prime numbers which multiply to give a number
Square number
the product of a number and itself
Highest Common Factor (HCF)
The largest factor that is common to all the given numbers
Lowest Common Multiple (LCM)
The smallest common multiple of twor or more positive integers
