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Number systems

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Total cards: 14•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (14)

#1
Front (Question)

Definition of a natural number

Back (Answer)

Made up of decimal digits

#2
Front (Question)

What represents natural numbers

Back (Answer)

N

#3
Front (Question)

Definition of an integer

Back (Answer)

Whole number, positive or negative, includes 0

#4
Front (Question)

What represents integers

Back (Answer)

Z

#5
Front (Question)

Definition of a rational number

Back (Answer)

Can be expressed as a fraction, denominator cannot be 0

#6
Front (Question)

What represents rational numbers

Back (Answer)

Q

#7
Front (Question)

Definition of an irrational number

Back (Answer)

Any number that cannot be represented as a ratio of an integer

#8
Front (Question)

What represents irrational numbers

Back (Answer)

R-Q

#9
Front (Question)

Give an example of an irrational number

Back (Answer)

Pi

#10
Front (Question)

Definition of a real number

Back (Answer)

Any positive or negative value including a fractional part, including integers, rational and irrational numbers

#11
Front (Question)

What is a real number represented by

Back (Answer)

R

#12
Front (Question)

Definition of an ordinal number

Back (Answer)

Identifies the position of something in a list

#13
Front (Question)

Difference between natural numbers and integers

Back (Answer)

Natural - above 0 Integer - below, above and including 0

#14
Front (Question)

Difference between rational and irrational numbers

Back (Answer)

Rational - can be expressed as a fraction Irrational - cannot be expressed as a fraction