Contemporary Mathematics

# Key Terms

## 3.1Prime and Composite Numbers

• natural numbers
• factor of a number
• multiple of a number
• prime number
• composite number
• prime factorization
• greatest common divisor (GCD)
• least common multiple (LCM)

## 3.2The Integers

• integer
• absolute value
• average of a set of numbers

## 3.4Rational Numbers

• density property of rational numbers
• improper fraction
• lowest terms
• mixed number
• rational number
• repeating decimal
• terminating decimal

## 3.5Irrational Numbers

• conjugate numbers
• difference of squares
• irrational numbers
• lowest terms
• rationalize the denominator

## 3.6Real Numbers

• complex number
• imaginary number
• real number

## 3.7Clock Arithmetic

• clock arithmetic
• modulo 7
• modulo 12

## 3.9Scientific Notation

• scientific notation
• standard notation

## 3.10Arithmetic Sequences

• sequence
• term of a sequence
• arithmetic sequence
• first term
• constant difference

## 3.11Geometric Sequences

• geometric sequence
• common ratio

## 3.11Geometric Sequences

• common ratio
• geometric sequence