Tina Farrell, from Levenshulme, called Camelot after failing to win with several cards.
The 23-year-old, who said she had left school without a maths GCSE, said: "On one of my cards it said I had to find temperatures lower than -8. The numbers I uncovered were -6 and -7 so I thought I had won, and so did the woman in the shop. But when she scanned the card the machine said I hadn't.
"I phoned Camelot and they fobbed me off with some story that -6 is higher - not lower - than -8 but I'm not having it."
This may be the definitive proof of the old saying: the lottery is a tax on people who aren’t good at math. Link -via reddit