Irenenaquimen1992go Irenenaquimen1992go Math Answered 11.) 8 and 12 GCF: LCM: 12.) 6 and 24 GCF: LCM: 13.) 9 and 12 GCF: LCM: 14.) 18 and 24 GCF: LCM: 15.) 10 and 30 GCF: LCM;