To solve this puzzle, you will need to work out the weights of each box. No two boxes weigh the same as each other, and each box weighs a whole number of kgs, between 0 and 9.

Now that you know how much each box weighs, you can work out the weight of U, V, W, X, Y and Z.

What are the values of A, B, C, D, E, F, G, H, J, K, U, V, W, X, Y and Z.