From June 2015, what is the maximum holding limit of Premium Bonds one person can hold (in terms of money)?

1. What did Scottish inventor John Shepherd-Barron pioneer and develop?
2. In which country was paper money first used as a currency?
3. The Royal Mint has its headquarters in which Welsh town?
4. Which South African gold coin accounted for 90% of the global gold coin market in 1980?
5. What is the maximum sum you can pay solely in fifty pence pieces for it to be still legal tender?
6. When did the following present-day British coins enter general ciculation: (a)two pence, (b)twenty pence, (c)the original round one pound, and (d)two pounds
7. Which Hollywood A-lister said: 'Money doesn't make you happy. I now have 50 million dollars but I was just as happy when I had forty-eight million'?
8. British coins: If you add the number of sides on a twenty pence piece to the sides on new one pound coin, what total do you get?
9. The 1966 science-fiction novelThe Moon Is a Harsh Mistresshelped popularize which saying which is sometimes given the acronym TANSTAAFL?