When you were born, both of your rich grandparents made a deal with your parents, to do with what money they'll give you for birthdays. Grandad's deal was :

I'll give you £1 for your first birthday. Then, the amounts that I give you each year will double every time

and Grandma said :

I will start by giving you £1 for your first birthday. Then, the amount I give you will be the combined total of all the last birthday presents that I have ever given you up to that point. Plus, every birthday you have that's a multiple of five, I'll give you an extra five pounds.

a)What amount of money do they each pay you for your 15th birthday

and

Who would have given you the most after 27 years?

(In reply to re: solution by Brian Wainscott)

Indeed Brian...

You win the award for biggest picker of nits! :-)

The question I was addressing (namely the amount given after 27 years) is, I think, correctly answered by my answer of £88,756,884.

I could have better phrased my statement by using "by the 27th birthday", rather than "on the 27th birthday".

--- SK

Posted by SilverKnight on 2003-09-30 11:20:51