Pizza maths

Today's maths comes to you courtesy of Wembley Master Chef, 44 Harrow Rd, HA9 6PG. This Pizza Deal poster appears in the window. That's good value, isn't it? Well let's check... First let's scale that down to the cost of one pizza, not two. Diameter Price 7 inch£3.75 9 inch£4.95 12 inch£6.95 15 inch£8.45 We can try to find the best value pizza by calculating price per inch. Diameter Price p per inch 7 inch£3.7554p 9 inch£4.9555p 12 inch£6.9558p 15 inch£8.4556p This suggests the 7 inch pizza is the best value at 54p per inch. But they're all remarkably close, each just over 50p per inch. It almost looks like this is how they determined the prices. But pizzas aren't linear, it's the area that increases. Please ignore everything in the previous table, it's mathematical rubbish. We could try to estimate the area by counting the number of pepperoni slices on each pizza. Diameter Price no of slices p per slice 7 inch£3.751231p 9 inch£4.952619p 12 inch£6.953222p 15 inch£8.453524p This…