LCM for 4 and 18

The first method to find LCM for numbers 4 and 18 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 4 and 18 is 2, so

LCM = (4 × 18) ÷ 2

LCM = 72 ÷ 2

LCM = 36

The second method to find LCM for numbers 4 and 18 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44

Multiples of 18: 18, 36, 54, 72

So the LCM for 4 and 18 is 36

Another method to find LCM for numbers 4 and 18 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: