Copyright © University of Cambridge. All rights reserved.
'Weekly Problem 21 - 2008' printed from http://nrich.maths.org/
From the second row we see that c, d, e are 1, 2, 4 in some order;
and from the third column we see that e> 2. Hence e=4 and we may
now deduce that g=8 and so f=5.
(Although their values are not required, it is now also possible to
deduce that c=1, a=3, b=9, d=2.)
This problem is taken from the UKMT Mathematical Challenges.View the previous week's solution