Problem number 1. Eric has 4 bricks, a white one and 3 grey ones. Which of the cubes shown below can he make with his 4 bricks? A, B, C, D or E. We are going to look at the number of bricks in each cube and see which one has only 1 white one and 3 grey ones. A has 2 grey ones and 2 white ones. So we are going to label that as 2W for white and 2G for grey. This cannot be our answer because we have 3 grey bricks and this one only has 2. Then we also only have 1 white brick and this one has 2. So this cannot be our answer. Next is B. It also has 2 white and 2 grey. It cannot be our answer for the exact same reason. If we look at C, we have 1 white and 3 grey. 1 white and 3 grey. This could be our answer because we have 1 white, he uses 1 white and 3 grey. So he can make this one. Then we have D which is the exact same thing as A and B. 2 white and 2 grey. So that is not going to work. We are going to cross that one out. Then we have E which is the exact same one as A, B, and D and it has the same problem. 2 white and 2 grey. So our answer is C.

bricks

cubes

white

grey

answer C