There are just under 14 million combinations possible in the UK national lottery. So the thing is, if the jackpot goes over £14m, you can buy a ticket in every combination and you will win. And if you don't share the jackpot you're going to at least recoup your investment. Same thing with yesterday's EuroMillions £88m jackpot. But you need to buy over 76 million tickets to cover the combinations, and as they were £1.50 each it didn't make as good financial sense as you'd think.