by Nick MacKinnon
Published: 17 July 2016 (link)
George and Martha are dabbling in the world of high temperature physics. George was measuring the temperature of a molten metal and wrote down the result. He thought this was in degrees Centigrade and so he converted it to Fahrenheit. However, Martha pointed out that the original result was already in degrees Fahrenheit and so George converted it to Centigrade. Martha wrote down the original result and each of George’s two calculated answers. She noted that they were all four-figure numbers and that their sum was palindromic.
What was the original four-figure result?