Find Least Common Multiple of 6, 4, 16 and 6 using prime factorisation method.
Answer
LCM( 6, 4, 16, 6 ) = 48
Explanation
Step 1: Write down factorisation of each number:
6 = 2 · 3
4 = 2 · 2
16 = 2 · 2 · 2 · 2
6 = 2 · 3
Step 2 : Match primes vertically:
| 6 | = | 2 | · | 3 | ||||||
| 4 | = | 2 | · | 2 | ||||||
| 16 | = | 2 | · | 2 | · | 2 | · | 2 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
| 6 | = | 2 | · | 3 | ||||||||
| 4 | = | 2 | · | 2 | ||||||||
| 16 | = | 2 | · | 2 | · | 2 | · | 2 | ||||
| LCM | = | 2 | · | 2 | · | 2 | · | 2 | · | 3 | = | 48 |
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