Understanding Least Common Multiple (LCM) and Continuous Division

On which day are both soups and sandwiches served at the school canteen?

• 10th day

• 15th day

• 20th day

• 25th day

What is the least common multiple of 5 and 4?

• 10

• 15

• 20

• 25

How can you find the LCM of a set of numbers?

• By dividing the numbers

• By adding the numbers

• By subtracting the numbers

• By listing all multiples of the numbers

What is the first step in the continuous division method?

• List the numbers horizontally

• Add the numbers

• List the numbers vertically

• Multiply the numbers

Which prime number is used first in the continuous division method?

• 3

• 5

• 2

• 7

What is the LCM of 8, 16, and 24 using the continuous division method?

• 56

• 48

• 32

• 40

What is the LCM of 20, 30, and 40 using the continuous division method?

• 180

• 120

• 300

• 240

Which of the following is a prime number?

• 11

• 9

• 6

• 4

What is the product of the common prime factors in the example of 20, 30, and 40?

• 15

• 20

• 10

• 5

What is the purpose of using the continuous division method?

• To find the difference of numbers

• To find the sum of numbers

• To find the least common multiple

• To find the greatest common factor