Question: The teacher agrees to order pizza for the class. For every student in the class, she will buy 2 pieces of cheese and 1 piece of onion and they will eat exactly that amount. A large pizza has 18 slices. She orders 6 total pizzas and there are 8 pieces of cheese and 4 pieces of onion leftover. How many students are in the class?
Answer with step-by-step thinking: Cheese pizzas are 2 / 3 of the pizza's purchased because 2 / (2 + 1) = 2 / 3. She buys 4 cheese pizzas because 6 x (2 / 3) = 4. These give her 72 pieces of cheese pizza because 4 x 18 = 72. The students at 64 pieces of cheese because 72 - 8 = 64. There are 32 students in her class because 64 / 2 = 32.
So the answer is 32.

Question: Maria went on a trip to Belgium. She paid $300 for the ticket and half of that for the hotel. How much money does she have left, when she had $760 at the beginning?
Answer with step-by-step thinking: For the hotel Maria paid 300 / 2 = $150. So Maria has 760 - 300 - 150 = $310 left.
So the answer is 310.

Question: A lorry is 500 pounds when empty. What will its weight be if it's loaded with 20 bags of apples, each weighing 60 pounds?
Answer with step-by-step thinking:
If the lorry is loaded with 20 bags of apples, each weighing 60 pounds, it will have an additional weight of 20 * 60 = 1200. The total weight of the lorry after being loaded with the bags of apples will be 500 + 1200 = 1700 pounds.
So the answer is 1700.