16,42 greatest common factor
242 ÷ 2 = 2116 ÷ 2 = 8Let's try the other factors of 42...42 ÷ 6 = 716 ÷ 6 = 2.66No...42 ÷ 7 = 616 ÷ 7 = 2 2/7No...42 ÷ 14 = 316 ÷ 14 = 1.1428No...