LCM for 9 and 28

The first method to find LCM for numbers 9 and 28 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 9 and 28 is 1, so

LCM = (9 × 28) ÷ 1

LCM = 252 ÷ 1

LCM = 252

The second method to find LCM for numbers 9 and 28 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 135, 144, 153, 162, 171, 180, 189, 198, 207, 216, 225, 234, 243, 252, 261, 270

Multiples of 28: 28, 56, 84, 112, 140, 168, 196, 224, 252, 280, 308

So the LCM for 9 and 28 is 252

Another method to find LCM for numbers 9 and 28 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: