On a phone in on the Matthew Wright show ( CH5) this morning a woman phoned in & said she spends £8 per week on lottery tickets, and has done for 18 years. She has only won one £50 prize in all that time.
It made me think just how much over the years has she spent?
In any eight years there can be a maximum of three leap years, adding three days. This may mean you take part in one more draw (since it is drawn twice a week and jemisa did not say whether the £8 was spent in a single draw or spread over the two) but it depends what day you started playing, what day the leap "day" fell, etc.
BTW the original question did not require "maths". It is simple mental arithmetic.