1. In which month of 1945 were atomic bombs dropped on Hiroshima and Nagasaki?
2. What name was given to the series of wars that took place in England starting in 1455 and ending in 1471?
3. Which large island lies to the south of Australia?
4. Which company had Nipper the dog as its trade mark?
5. Who did Jimmy Carter succeed as President of the United States?
6. In which sport would you compete for the Federation Cup?
7. What is the more common name for the fruit citrus grandis?
8. Which country formerly occupied the West Bank, scene of much recent trouble between Isreal and Palestine?
9. The flag of which US state has a Union Jack in the top left corner?
10. Who is the 1st female in line to the British throne?
3. Which large island lies to the south of Australia?
Tasmania
4. Which company had Nipper the dog as its trade mark?
HMV
5. Who did Jimmy Carter succeed as President of the United States?
Gerald Ford
8. Which country formerly occupied the West Bank, scene of much recent trouble between Israel and Palestine?
Jordan
2. What name was given to the series of wars that took place in England starting in 1455 and ending in 1471? Wars of the Roses
6. In which sport would you compete for the Federation Cup? Ladies Tennis
10. Who is the 1st female in line to the British throne? Princess Beatrice
1. In which month of 1945 were atomic bombs dropped on Hiroshima and Nagasaki?
August
7. What is the more common name for the fruit citrus grandis?
grapefruit (or pomelo, apparently, but that's basically the same thing anyway isn't it?)
9. The flag of which US state has a Union Jack in the top left corner?
Hawaii 
The number of answers given by each Contributor do fall into a nice little sequence
4-3-2-1
A completely pointless observation, but wergh anyway.
