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Least Common Multiple (LCM) of 21 and 125

The least common multiple (LCM) of 21 and 125 is 2625.

What is the Least Common Multiple (LCM)?

The LCM of two integers is the smallest positive integer that is divisible by both numbers. It is often used to find common denominators and solve problems involving periodic events.

Formula for LCM

The LCM of two numbers can be calculated using their GCD:

LCM(a, b) = |a × b| ÷ GCD(a, b)

How to Calculate the LCM of 21 and 125?

First, calculate the GCD of 21 and 125 using the Euclidean algorithm. Then use the formula above to find the LCM.

Step-by-Step GCD Calculation

StepCalculation
1 21 ÷ 125 = 0 remainder 21
2 125 ÷ 21 = 5 remainder 20
3 21 ÷ 20 = 1 remainder 1
4 20 ÷ 1 = 20 remainder 0

Examples of LCM Calculations

NumbersLCM
163 and 7512225
139 and 19527105
64 and 541728
147 and 689996
132 and 624092

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