Bobby put his dog in a square shaped dog pen. Which of the following could be the area of Bobby's square dog pen, if the length of the sides are whole numbers?

48 square feet , 144 square feet, 120 square feet, 24 square feet ?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?