## Problem of the Week 6 – Divisibility by 6

Problem The number 25a where a is a digit is divisible by 6. What is the largest possible value of a? Solution A number is divisible by 6 if it is both…

## Problem of the Week 3 – Largest Possible Value

Problem The number $latex 25ab$ where $latex a$ and $latex b$ are digits is divisible by $latex 6$. What is the largest possible value of $latex a + b$? Solution…