Question

Tim made 4 stacks of wooden blocks. The first stack was 4 blocks tall. The second stack was 6 blocks taller than the first. The third stack was 7 blocks shorter than the second stack, and the last stack was 5 blocks taller than the third stack. How many blocks did Tim use in all?

Answer 1

Tim used 26 blocks of wood

Answer 2

Tim used 25 blocks.
4 blocks for the first stack
10 blocks for the second [6 blcoks taller]
3 blocks for the third [7 blocks shorter]
8 blocks for the fourth [5 blocks taller]
4+10+3+8 = 25