Question
Find Least Common Multiple of 5, 2, 1 and 1 using prime factorisation method.
Answer
LCM( 5, 2, 1, 1 ) = 10
Explanation
Step 1: Write down factorisation of each number:
5 = 5
2 = 2
1 = 1
1 = 1
Step 2 : Match primes vertically:
| 5 | = | 5 | ||||
| 2 | = | 2 | ||||
| 1 | = | 1 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
| 5 | = | 5 | ||||||
| 2 | = | 2 | ||||||
| 1 | = | 1 | ||||||
| LCM | = | 1 | · | 2 | · | 5 | = | 10 |
This page was created using
LCM Calculator