Find Least Common Multiple of 8, 19 and 23 using prime factorisation method.
Answer
LCM( 8, 19, 23 ) = 3496
Explanation
Step 1: Write down factorisation of each number:
8 = 2 · 2 · 2
19 = 19
23 = 23
Step 2 : Match primes vertically:
| 8 | = | 2 | · | 2 | · | 2 | ||||
| 19 | = | 19 | ||||||||
| 23 | = | 23 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
| 8 | = | 2 | · | 2 | · | 2 | ||||||
| 19 | = | 19 | ||||||||||
| 23 | = | 23 | ||||||||||
| LCM | = | 2 | · | 2 | · | 2 | · | 19 | · | 23 | = | 3496 |
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.
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