1) If (15):(1x) =(1x):(100125), then the value of x is : A) 1.5 B) 2 C) 2.5 D) 3 E) 3.5 Answer: Option CExplanation:15:1x =1x:100125 ⇒(1x×1x) =(15×100125) =425 =1x2 x2=254 x=52 =2.5