Question: Paul eats a lot when he studies. He loves sandwiches and eats them at the same rate every three days. He eats 2 sandwiches the first day, then doubles that number of sandwiches for the second day. On the third day, he doubles the number of sandwiches he ate on the second day. How many sandwiches would Paul eat if he studied 6 days in a row? Think carefully first, then make a decision:
Paul doubles the amount that he ate on the second day, so eats 2 x 2 = 4 sandwiches. For the third day, he doubles the number of sandwiches he ate on the second day, so eats 2 x 2 x 2 = 8 sandwiches. To get the total amount of sandwiches he ate over three days it's necessary to add up the amount he ate each day: 2 + 4 + 8 = 14 sandwiches. Since he eats 14 sandwiches every 3 days, then in 6 days he would eat 14 x 2 = 28 sandwiches in total. So the answer is 28.