Natural and Whole Numbers Week 2 Session 2

1. What is the definition of the Highest Common Factor (HCF)?

• The smallest factor of a number

• The smallest multiple common to two or more numbers

• The largest factor common to two or more numbers

• The sum of all factors of a number

2. What is the HCF of 12 and 18?

• 3

• 6

• 12

• 18

3. What is the definition of the Least Common Multiple (LCM)?

• a) The smallest factor of a number

• b) The smallest number that is a multiple of two or more numbers

• c) The largest factor common to two or more numbers
  

• d) The sum of all multiples of a number

4. What is the LCM of 12 and 18?

• 36

• 24

• 18

• 12

5. What is the first step in finding the LCM using the division method?

• a) Multiply all the given numbers

• b) Divide the numbers by the smallest prime factor

• c) Subtract the smallest number from the largest number

• d) Add all the given numbers

6. Which of the following is NOT a method to find the HCF?

• a) Listing factors

• b) Prime factorization

• c) Division method

• d) Multiplying the numbers directly

7. How do you calculate the LCM using the division method?

• a) Divide the numbers by the smallest prime factor until all numbers become 1, then multiply all divisors.

• 
  b) Multiply all given numbers directly.

• c) Add the numbers and divide by 2.

• d) Subtract the smallest number from the largest.