7

FAST FOOD

Pete’s Pizza Pantry has been a rip-roaring success so far. ‘We pride ourselves on our amazingly speedy service,’ says Pete, who likes to take a stopwatch to his hard-working staff as they slave over the grills. He started off with three pizza makers who could produce, in total, three pizzas in three minutes. Now business is booming and he’s doubling his staff to six pizza makers.

How long will it take them to produce six pizzas?