diff -r 7e084cfbaac9 -r 720206dcacf7 cws/main_cw03.tex
--- a/cws/main_cw03.tex	Mon Jan 25 00:21:00 2021 +0000
+++ b/cws/main_cw03.tex	Fri Jan 29 00:56:19 2021 +0000
@@ -406,7 +406,7 @@
 
   \noindent correctly to just \texttt{ONE}, where \texttt{SEQ} is nested
   50 or more times?\\
-  \mbox{}\hfill[2 Mark]
+  \mbox{}\hfill[2 Marks]
 \end{itemize}
 
 \subsection*{Background}