White and black blocks are stacked in a vertical column so that no two blocks of the same color are adjacent. IF there are 247 blocks in the stack, how many white blocks are there in the stack?
A. The top block in the stack is white
B. There are 5 white blocks in the 10 blocks at the bottom of the stack.
Is OA A?
1) Would give us the whole stack's combination?
2) This cant tell us what is the lowest block?