LCM for 20 and 100
What's the Least Common Multiple (LCM) of 20 and 100?
(Hundred)
Finding LCM for 20 and 100 using GCF's of these numbers
The first method to find LCM for numbers 20 and 100 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:
LCM = (Number1 × Number2) ÷ GCF
GCF of numbers 20 and 100 is 20, so
LCM = (20 × 100) ÷ 20
LCM = 2000 ÷ 20
LCM = 100
Finding LCM for 20 and 100 by Listing Multiples
The second method to find LCM for numbers 20 and 100 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 100: 100, 200, 300, 400, 500, 600, 700, [...], 100
So the LCM for 20 and 100 is 100
Finding LCM for 20 and 100 by Prime Factorization
Another method to find LCM for numbers 20 and 100 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:
All Prime Factors of 20: 2, 2, 5 (exponent form: 22, 51)
All Prime Factors of 100: 2, 2, 5, 5 (exponent form: 22, 52)
22 × 52 = 100
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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