Divisibility Rules

Open Ended

Explain why consecutive numbers are always relatively prime. Provide an example to support your explanation.

Multiple Choice

Which of the following statements is true about the relationship between GCD and LCM of two numbers a and b?

• GCD(a, b) × LCM(a, b) = a + b

• GCD(a, b) × LCM(a, b) = a × b

• GCD(a, b) + LCM(a, b) = a × b

• GCD(a, b) + LCM(a, b) = a + b