MINDBENDER

1. The sum of two numbers is 637; the difference between them is 209. What are the numbers?

2. What connects gain, king and rage?

3. Which female poet might have INTERRED GUEST?

4. Which is the odd one out: Humber, Tamar, Arun, Mersey?

5. Crack the code to find three African countries: LJVNAXXW, DPJWMJ, VXIJVKRZDN.