The prime factorization of 10 is 2 x 5. You need another number to find a GCF or LCM.
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2 |10,18 , |_________ 5,9 The GCF of 10 and 18 is 2.
15 5,3 10 5,2 The common factors are 1 and 5.
155,3105,2The GCF is 5.The GCF of 10 and 15 is 5.
2 |10,18 , |_________ 5,9 The GCF is 2.
Yes.