Leigh Mercer

Leigh Mercer (1893–1977) was a noted British wordplay and recreational mathematics expert.[1] He is best known for devising the palindrome "A man, a plan, a canal: Panama!".[2]

The following mathematical limerick is attributed to him:[3]

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.
A reading of the Limerick "A dozen, a gross, and a score"


  1. ^ A. Ross Eckler: Leigh Mercer, Palindromist. In: Word Ways. Volume 24, Issue 3, 1991, Article 2, p. 131–138 [1]
  2. ^ 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).
  3. ^ "Math Mayhem". Lhup.edu. Archived from the original on 2017-10-08. Retrieved 2011-06-29.