Find Least Common Multiple of 170 and 238 using prime factorisation method.
Answer
LCM( 170, 238 ) = 1190
Explanation
Step 1: Write down factorisation of each number:
170 = 2 · 5 · 17
238 = 2 · 7 · 17
Step 2 : Match primes vertically:
| 170 | = | 2 | · | 5 | · | 17 | ||
| 238 | = | 2 | · | 7 | · | 17 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
| 170 | = | 2 | · | 5 | · | 17 | ||||
| 238 | = | 2 | · | 7 | · | 17 | ||||
| LCM | = | 2 | · | 5 | · | 7 | · | 17 | = | 1190 |
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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