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### Math Puzzles & Brain Teasers

The Great Pizza Deal

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 Hide all answers   View all answers   Print   Try the Quiz 1. The 8" pizza sells for \$ 3.99 at my favorite pizza store. The store claims they have a great deal on the large 12" pizza, which is specially priced at \$ 7.63. What is the per cent discount the store is offering? Answer: 15 Solution: The small pizza has a diameter of 8" and therefore an area proportional to 82. The large pizza has a diameter of 12" and therefore an area proportional to 122. If the pizzas are priced in accordance with their areas, then Price of large pizza / Price of small pizza = (12 / 8)2 = 2.25 or Price of large pizza = 2.25 × 3.99 = 8.98. Thus, Discount on large pizza = [1 − (7.63 / 8.98)] × 100 = 15 %. 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