Question

you find your mass to be 42 kg on a weighing machine is your nose more or less than 42 kg

Answer 1

of course less than 42 kg

Answer 2

As we know that the mass of an object is constant throughout the universe, if the object is at rest or moving with an ordinary speed.              So if its mass is 42kg when it is weighed its mass is exactly 42 kg neither more nor less than that.