July 2020
Problem of the Month
SUM-THING MISSING
by Ralph Fellows
in GAMES WORLD OF PUZZLES
All 25 boxes in the square below contain whole numbers, but more than half of them are missing.
The five numbers in each row add up to the same total, and the five numbers in each column also add up to that same total.
Can you determine what number belongs in the square containing the question mark?
