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Flashcards in Sets of Numbers Deck (15)
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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 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


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