You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg ?
This question is correct but it is the way we are interpreting the question that is wrong . W = mg . If g is constant then the weight is equivalent to the mass of the body . w = m . So when we are standing on the wheighing scale the reading is 42kgf ( wheight of the body ) . Wheight is the gravitational force acting on the object in the downward direction . According to the rule of bouyancy , all fluids apply an upthrust force in the upward direction. So the whieght shown on the weighing scale would be less than 42 kg .Thus we can say that our actual wheight / mass will be slightly more .