
Understanding Least Common Multiple (LCM)

Interactive Video
•
Mathematics
•
5th - 8th Grade
•
Hard

Sophia Harris
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Least Common Multiple (LCM) of two or more numbers?
The largest number that is a multiple of all the numbers.
The smallest number that is a multiple of all the numbers.
The largest number that is a factor of all the numbers.
The smallest number that is a factor of all the numbers.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a method to find the LCM?
Adding the numbers together.
Dividing the numbers by their greatest common factor.
Listing out the multiples of the numbers.
Subtracting the smaller number from the larger number.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When listing multiples to find the LCM, what should you do if no common multiple is found initially?
Multiply all the numbers together.
Choose the smallest number as the LCM.
Stop and choose the largest number as the LCM.
List more multiples until a common one is found.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the LCM of 5, 8, and 20 using the listing multiples method?
80
20
40
60
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why might prime factorization be preferred over listing multiples for finding the LCM?
It is more accurate for all numbers.
It is faster for smaller numbers.
It is easier for larger numbers.
It requires less mathematical knowledge.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in finding the LCM using prime factorization?
Add all the numbers together.
List the prime factors of each number.
Divide the numbers by their greatest common factor.
Multiply all the numbers together.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In prime factorization, how do you determine which prime factors to use for the LCM?
Use the highest power of each prime factor present.
Use only the smallest prime factors.
Use the lowest power of each prime factor present.
Use only the prime factors of the largest number.
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