LCM( 7, 2, 13, 2 ) = 182
Step 1: Write down factorisation of each number:
7 = 7
2 = 2
13 = 13
2 = 2
Step 2 : Match primes vertically:
7 | = | 7 | ||||
2 | = | 2 | ||||
13 | = | 13 |
Step 3 : Bring down numbers in each column and multiply to get LCM:
7 | = | 7 | ||||||
2 | = | 2 | ||||||
13 | = | 13 | ||||||
LCM | = | 2 | · | 7 | · | 13 | = | 182 |