LCM( 6, 15, 8, 13 ) = 1560
Step 1: Write down factorisation of each number:
6 = 2 · 3
15 = 3 · 5
8 = 2 · 2 · 2
13 = 13
Step 2 : Match primes vertically:
6 | = | 2 | · | 3 | ||||||||
15 | = | 3 | · | 5 | ||||||||
8 | = | 2 | · | 2 | · | 2 | ||||||
13 | = | 13 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
6 | = | 2 | · | 3 | ||||||||||
15 | = | 3 | · | 5 | ||||||||||
8 | = | 2 | · | 2 | · | 2 | ||||||||
13 | = | 13 | ||||||||||||
LCM | = | 2 | · | 2 | · | 2 | · | 3 | · | 5 | · | 13 | = | 1560 |