Question: Brenda and nine of her friends want to order a pizza. They decide that each person will eat 2 slices. If each pizza has 4 slices, how many pizzas should they order?
Answer with step-by-step thinking: All together, Brenda and her friends make a group of 1 + 9 = 10 people. If they each want to eat 2 pizza slices, there should be 10 * 2 = 20 slices. Since a pizza has 4 slices, they will have to order 20 / 4 = 5 pizzas.
So the answer is 5.


Question: Ruby is taking dance lessons. They cost $75 for 10 classes in one pack. She can add additional classes at the price of 1/3 more than the average price of a class on the lesson in the pack. if she takes 13 total classes, how much does she pay?
Answer with step-by-step thinking: The classes in the pack cost $7.5 each because 75 / 10 = 7.5. An additional class costs $10 because 7.5 x (1 + (1 / 3)) = 10. She buys 3 extra classes because 13 - 10 = 3. Her three additional classes cost $30 because 3 x 10 = 30. Her total cost is $105 because 75 + 30 = 105.
So the answer is 105.


Question: Bob and Kate went to a restaurant for dinner. After they were done eating the waitress gave a $30 bill to Bob and a $25 bill to Kate, but told them they were eligible for special discounts; 5% for Bob, 2% for Kate. Considering the discounts, how much do they have to pay in total?
Answer with step-by-step thinking:
5% of $30 is (5 / 100) * 30 = $1.5. The dollar amount of Bob's discount is $1.5 so he will pay $30 - $1.5 = $28.5. 2% of $25 is (2 / 100) * $25 = $0.5. The dollar amount of Kate's discount is $0.5 so she will pay $25 - $0.5 = $24.5. Altogether they will pay $28.5 + $24.5 = $53.
So the answer is 53.