Copyright © University of Cambridge. All rights reserved.
'So Many Sums' printed from http://nrich.maths.org/
In this addition each letter stands for a different digit, with $S$ standing for 3. What is the value of $Y\times O$?
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.