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Sunday Times Teaser 2529

by Victor Bryant

Published: 13 March 2011 (link)

A letter to The Times concerning the inflated costs of projects read: “When I was a financial controller, I found that multiplying original cost estimates by pi used to give an excellent indication of the final outcome.” Interestingly, I used the same process (using 22/7 as a good approximation for pi). On one occasion, the original estimate was a whole number of pounds (less than £100,000), and this method for the probable final outcome gave a number of pounds consisting of exactly the same digits, but in the reverse order.

What was the original estimate?

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  1. Brian Gladman permalink

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