Pizza DiscountMath brain teasers require computations to solve.
The 10" 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 $ 4.31. What is the per cent discount the store is offering?
The small pizza has a diameter of 10" and therefore an area proportional to 10^2 = 100.
The large pizza has a diameter of 12" and therefore an area proportional to 12^2 = 144.
If the pizzas are priced according to their areas, then,
Price of large pizza / Price of small
pizza = (12 / 10)^2 = 1.44
Normal price of large pizza = 1.44 x $3.99 = $5.75.
Thus, discount on large pizza = [1 - ($4.31 / $5.75)] x 100 = 25%.
See another brain teaser just like this one...
Or, just get a random brain teaser
If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.
Back to Top