human
Phil likes to collect baseball cards. He buys a pack of twenty each week for a year, but then loses half of them one day in a fire. How many baseball cards does Phil have left?
assistant
How many cards does Phil start with? ** Since there are 20 cards in a pack and 52 weeks in a year, Phil starts by collecting 20*52= <<20*52=1040>>1040 baseball cards
How many cards does Phil lose? ** He then loses half of them for 1040/2= <<1040/2=520>>520 cards remaining.
#### 520