George and 4 friends are building a two-story clubhouse using bricks. In six days they placed 905 bricks. If each person placed an equal number of bricks how many bricks did each person place?

There are 5 people total (George plus 4 friends). If they each placed an equal amount out of the 905 bricks placed, then we need to divide this number between the five. To do so, we divide 905 by 5.

905 / 5 = 181

They've each placed 181 bricks.