LCM for 20 and 25

The first method to find LCM for numbers 20 and 25 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 20 and 25 is 5, so

LCM = (20 × 25) ÷ 5

LCM = 500 ÷ 5

LCM = 100

The second method to find LCM for numbers 20 and 25 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 20: 20, 40, 60, 80, 100, 120, 140

Multiples of 25: 25, 50, 75, 100, 125, 150

So the LCM for 20 and 25 is 100

Another method to find LCM for numbers 20 and 25 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: