Respuesta :

1234umathuman

Answer:

21

Step-by-step explanation:

Since 7 x 3 is 21

And 21 x 1 is 21

wegnerkolmp2741o

Answer:

21

Step-by-step explanation:

To find the least common multiple of 7 and 21 , we need to break each number down to its prime factors

7 = 7

21 = 7*3

To find the least common multiple multiply each factor the greatest number of times it occurs in either number.

The LCM = 7*3

               = 21

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