LCM( 9, 63, 9, 62 ) = 3906
Step 1: Write down factorisation of each number:
9 = 3 · 3
63 = 3 · 3 · 7
9 = 3 · 3
62 = 2 · 31
Step 2 : Match primes vertically:
9 | = | 3 | · | 3 | ||||||
63 | = | 3 | · | 3 | · | 7 | ||||
62 | = | 2 | · | 31 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
9 | = | 3 | · | 3 | ||||||||
63 | = | 3 | · | 3 | · | 7 | ||||||
62 | = | 2 | · | 31 | ||||||||
LCM | = | 2 | · | 3 | · | 3 | · | 7 | · | 31 | = | 3906 |