Daley’s Gold
In July 2009, 16 months after winning the individual diving gold medal from the 10-metre platform board at the European Championships at the age of 13, Thomas Daley won the gold medal at the World Championships. So it is fitting that I can offer this puzzle:
In this subtraction, digits have been consistently replaced by letters, with different letters representing different digits. No number starts with a zero. Since there are 11 different letters, everything is in base 11 – use the digits 0 to 9 as normal and add a symbol of your choice for the extra digit.…
