LCM for 54 and 18

The first method to find LCM for numbers 54 and 18 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 54 and 18 is 18, so

LCM = (54 × 18) ÷ 18

LCM = 972 ÷ 18

LCM = 54

The second method to find LCM for numbers 54 and 18 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 54: 54, 108, 162, 216, 270, [...], 54

Multiples of 18: 18, 36, 54, 72, 90

So the LCM for 54 and 18 is 54

Another method to find LCM for numbers 54 and 18 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: