Respuesta :

Answer:

a)30-1,2,3,5,6,10,15,30

b)20-1,2,4,5,10,20

Step-by-step explanation:

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Answer:

a) Common factors missing for 30 are 5 & 6

b) Common factors for 20:- 1, 2, 4, 5, 10, 20