If three numbers are in the ratio of 1 : 3 : 7, and their LCM is 336, then their HCF is:

16 18 10 12

16

Three numbers are in the ratio of 1 : 3 : 7 LCM = 1x × 3x  × 7x = 336 x(1 × 3  × 7) = 336 x = 16 = HCF