# 5 + EN +

The average age of four brothers is 23. If the average age of the older three is 26, how old is the youngest? Each symbol represents a different digit from 1 to 9. The sum of the digits in each row and column is shown. Can you work out which digit each symbol stands for? When you have replaced each symbol in the square, find the sum of the numbers along the diagonal line that starts in the top left-hand corner.