1.)c. 196 As factors of 84 are 1,2,3,4,6,7,12,14,21,28,42,84 And sum of them which are multiple of 7= 7+14+21+28+42+84=196 2.) 120 ans Smallest common multiple of 30,45,60 between 200-400 is 360 and largest common factor of 15,24,45 is 3 May be its division between them so 360÷3 =120 ans