This afternoon Pizza Express engaged in some Twitter-based advertising that I feel warrants the attention of the #mathspolice: Colin & Dave.

This looks to be a straight forward puzzle, but I expect the 140 characters limit has lead to the puzzle being set without enough rigour, or was it just another example of a pizza chain and it’s careless approach to maths? As I see it, there are at least 2 different interpretations to the question provided.

*1)* Those 2 people order 2 pizzas in 2 minutes, therefore their rate of ordering is 1 pizza/minute. So if they continue to order more pizzas at that rate them alone will order all 500 in 500 minutes (i.e. the answer is **2** people).

*2)* If the restaurant is full of people and everyone orders just one pizza (not mentioned in the question so would have to be a heavy assumption) and everyone we consider orders at the same rate as the original couple then it will take **500** people (if they’re ordering in series).

**3)** Anyone have any other interpretation?

As it stands I believe that #1 is the most accurate answer, regardless of how greedy it makes those 2 look. It comes down to the question referring to the **rate** at which the couple is ordering their pizzas at: they are ordering at a rate of **1 pizza per minute** so just the 2 of them will order the full quota in the desired time.

Pizza Express have chosen the second option, which I feel only works as an answer if the question is rephrased. They can blame 140 characters, but I blame bad maths… #mathspolice I turn the investigation over to you.

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