Level 1
There are 3 boxes. The mass of Box A is 3.4 kg, the mass of Box B is 5.8 kg and the mass of Box C is 4.2 kg. Which box has its mass nearest to the average mass of the 3 boxes? Give the letter only for the answer.
Level 2
Jason joined Zumba Fitness Club three years ago when he weighed 84 kg 400 g. Given that he lost an average of 3 kg 500 g every year, how much does he weigh now? (Give the answer in kg and g.)