Home > Math Puzzles & Brain Teasers > Print Preview
Math Puzzles & Brain Teasers
The Great Pizza Deal
Hide all answers
View all answers
Try the Quiz
1. The 10" pizza sells for $ 5.99 at my favorite pizza store. The store claims they have a great deal on the large 14" pizza, which is specially priced at $ 10.57. What is the per cent discount the store is offering?
The small pizza has a diameter of 10" and therefore an area proportional to 102.
The large pizza has a diameter of 14" and therefore an area proportional to 142.
If the pizzas are priced in accordance with their areas, then
Price of large pizza / Price of small pizza = (14 / 10)2 = 1.96 or
Price of large pizza = 1.96 × 5.99 = 11.74.
Thus, Discount on large pizza = [1 − (10.57 / 11.74)] × 100 = 10 %.
Food for thought:
Can you think of items which are priced in accordance with their weights or volumes?
Try the Quiz : Puzzles & Brain Teasers : The Great Pizza Deal