LCM for 1 and 9
What's the Least Common Multiple (LCM) of 1 and 9?
(Nine)
Finding LCM for 1 and 9 using GCF's of these numbers
The first method to find LCM for numbers 1 and 9 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:
LCM = (Number1 × Number2) ÷ GCF
GCF of numbers 1 and 9 is 1, so
LCM = (1 × 9) ÷ 1
LCM = 9 ÷ 1
LCM = 9
Finding LCM for 1 and 9 by Listing Multiples
The second method to find LCM for numbers 1 and 9 is to list out the common multiples for both nubmers and pick the first which matching:
Multiples of 1: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
Multiples of 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, [...], 9
So the LCM for 1 and 9 is 9
Finding LCM for 1 and 9 by Prime Factorization
Another method to find LCM for numbers 1 and 9 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:
All Prime Factors of 1: 1 (exponent form: 11)
All Prime Factors of 9: 3, 3 (exponent form: 32)
11 × 32 = 9
Related Calculations
LCM Table
About "Least Common Multiple" Calculator
Least Common Multiple (LCM) also known as the Lowest Common Multiple or Smallest Common Multiple of 2 numbers - it is the smallest positive integer that is divisible by both numbers