Nice puzzle...thanks.
The only solution where
a=5
b=2
c=9
d=3
e=7
f=4
g=0
h=1
j=8
k=6
u=0
v=2
w=0
x=9
y=8
z=5
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.