Table of Contents
Can you always find the least common multiple of two numbers by multiplying them together?
Note that the smallest multiple of both the numbers is 12. Another common multiple is 24, but this not the smallest. You can always get a common multiple of numbers (you can have more than two!) by multiplying them together, but this is not always the smallest one.
Is the LCM of two numbers always the product of the two numbers?
The Least Common Multiple of two numbers is the product of the two numbers only when they are relatively prime.
How do you find the least common multiple of two numbers?
How to Find LCM by Listing Multiples
- List the multiples of each number until at least one of the multiples appears on all lists.
- Find the smallest number that is on all of the lists.
- This number is the LCM.
How do you find a common multiple of two numbers?
We can find the common multiples of two or more numbers by listing the multiples of each number and then finding their common multiples. For example, to find the common multiples of 3 and 4, we list their multiples and then find their common multiples. Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36.
What is the GCF of 12 and 30?
6
Answer: GCF of 12 and 30 is 6.
What is the three methods in finding the LCM?
There are three major methods to find the LCM of numbers, such as: Listing the multiples of the given numbers, prime factorisation of numbers and by division method.
What is the LCM of 3 and 9?
9
What is the LCM of 3 and 9? Answer: LCM of 3 and 9 is 9.
What is the formula for the LCM?
Also, check the LCM of two numbers to understand the steps to find the LCM of any two number easily….Formula of L.C.M.
| Formulas To Calculate LCM | |
|---|---|
| L.C.M formula for any two numbers | L.C.M. = a×bgcd(a,b) |
What are the three methods in finding the LCM?
What is the GCF of 7 28?
7
Answer: GCF of 7 and 28 is 7.
What’s the HCF of 12 and 20?
4
The HCF of 12 and 20 is 4. To calculate the HCF (Highest Common Factor) of 12 and 20, we need to factor each number (factors of 12 = 1, 2, 3, 4, 6, 12; factors of 20 = 1, 2, 4, 5, 10, 20) and choose the highest factor that exactly divides both 12 and 20, i.e., 4.
What is the formula of LCM?
1) For two given numbers if we know their greatest common divisor i.e. GCD, then LCM can be calculated easily with the help of given formula: LCM = \frac{a × b}{(gcd)(a,b)}