Proof: Maths Edexcel A-Level

Natural Numbers

• Positive integers

• Positive or negative integers, including 0

• Numbers that can be written as p/q, where p and q are integers

• All numbers, rational or irrational

Integers

• Positive whole numbers

• Positive or negative whole numbers, including 0

• Numbers that can be written as p/q, where p and q are integers

• All numbers, rational or irrational

Rational numbers

• Positive whole numbers

• Positive or negative whole numbers, including 0

• Numbers that can be written as p/q, where p and q are integers

• All numbers, rational or irrational

Irrational numbers

• Numbers that cannot be written as p/q, where p and q are integers

• Positive or negative whole numbers, including 0

• Numbers that can be written as p/q, where p and q are integers

• All numbers, rational or irrational

Real numbers

• Numbers that cannot be written as p/q, where p and q are integers

• Positive or negative whole numbers, including 0

• Numbers that can be written as p/q, where p and q are integers

• All numbers, rational or irrational

The Natural Numbers

• N

• Z

• Q

• I

Integers

• R

• Z

• Q

• I

Rational Numbers

• R

• N

• Q

• I

Irrational Numbers

• R

• N

• Z

• I

Real Numbers

• R

• N

• Z

• Q