Question
Find Least Common Multiple of 4, 3 and 5 using ladder method..
Answer
LCM( 4, 3, 5 ) = 60
Explanation
Step 1 : Place the numbers inside division bar:
| 4 | 3 | 5 |
Step 2 : Find a prime number which can divide at least two of your numbers.
Since there are no primes that divides at least two of given numbers, we conclude that the LCM is a product of starting numbers.
LCM = 4 · 3 · 5 = 60
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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