Leigh Mercer

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Leigh Mercer (1893–1977) was a noted British wordplay and recreational mathematics expert. He is best known for devising the celebrated palindrome "A man, a plan, a canal — Panama!".[1]

The following mathematical limerick is attributed to him:[2]

This is read as follows:

A dozen, a gross, and a score
Plus three times the square root of four
Divided by seven
Plus five times eleven
Is nine squared and not a bit more.


  1. ^ Published in Notes and Queries, 13 Nov. 1948, according to The Yale Book of Quotations, F. R. Shapiro, ed. (2006, ISBN 0-300-10798-6).
  2. ^ "Math Mayhem". Lhup.edu. Retrieved 2011-06-29.