common multiple of 8 and 20勁急

Multiples of 8: 8,16,24,32,40
Mutiples of 20: 20,40
The common multiple is 40.
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Multiple of 8 : 8,16,32,40,48,56,64
Multiple of 20: 20,40,80,100
Therefore : 40 is the LCM of 8 and 20

Hope you found it useful!:)

multiples of 8: 8,16,27,32,40
multiples of 20: 20,40,60
The least common multiple of 8 and 20 is 40.