Luke started working on a 1000-piece jigsaw puzzle. The first day he worked on it, he put together 10% of the pieces. On the second day, he put together another 20% of the remaining pieces from the first day. On the third day, he put together 30% of the remaining pieces from the previous day. How many pieces does he have left to complete after the third day?
How many pieces did Luke put together on the first day? ** Luke started putting together, 1000 x 0.1 = <<1000*0.1=100>>100 pieces.
How many pieces were left after the first day? ** The next day, there were 1000-100 = <<1000-100=900>>900 pieces left.
How many pieces did Luke put together on the second day? ** Then he put together 900 * 0.2 = <<900*0.2=180>>180 pieces on the second day.
How many pieces were left after the second day? ** So there were 900 - 180 = <<900-180=720>>720 pieces left.
How many pieces did Luke put together on the third day? ** On the third day, he put together 720 * 0.3 = <<720*0.3=216>>216 pieces.
How many pieces does he have left to complete after the third day? ** Therefore, Luke still has 720 - 216 = <<720-216=504>>504 pieces left to complete the puzzle.
#### 504