1) The H.C.F. of 3666 and 3444 is : A) 3 B) 5 C) 6 D) 8 Answer: Option CExplanation:3,666 = 2 x 3 x 13 x 47;3,444 = 2<sup>2</sup> x 3 x 7 x 41; Therefore HCF = 2 x 3 = 6