AICE Thinking Skills

The Square Deal restaurant has a stock of square and rectangular tables which it uses depending on the number of bookings for dinner. Each rectangular table seats 6 and each square table seats 4. Tonight they have 50 people booked for dinner. a) If the only use square tables, how many square tables would they need? b) If they used the smallest number of tables possible with no empty seats, how many square tables must they use