LCM( 280, 23 ) = 6440
Step 1: Write down factorisation of each number:
280 = 2 · 2 · 2 · 5 · 7
23 = 23
Step 2 : Match primes vertically:
280 | = | 2 | · | 2 | · | 2 | · | 5 | · | 7 | ||
23 | = | 23 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
280 | = | 2 | · | 2 | · | 2 | · | 5 | · | 7 | ||||
23 | = | 23 | ||||||||||||
LCM | = | 2 | · | 2 | · | 2 | · | 5 | · | 7 | · | 23 | = | 6440 |
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.