### Brain Teasers

# £7.11 At The 7-11 store

Mad Ade entered his local 7-11 store to purchase some provisions. He picked up some "dead rat and scabby monkey" flavoured crisps (potato chips for those of you who are American), a large bottle of pickled onion flavoured pop (soda), a left handed toilet roll and a tub of Kebab flavoured ice cream. At the checkout Mad Ade was told that the cost was £7.11. Mad Ade was curious that the cost was the same as the store name, so he inquired as to how the figure was derived. The acne riddled clerk said that he had simply multiplied the prices of the four individual items. Mad Ade complained as this had been done to him in another teaser (Entitled "Five Pound Seventy Pence" Teaser #4848), only with three amounts instead of four. He protested that the four prices should have been ADDED, not MULTIPLIED. The spotty clerk said that that was OK with him, but, the result was still the same: exactly £7.11.

What were the prices of the four items?

What were the prices of the four items?

### Answer

The prices are: £1.20, £1.25, £1.50, and £3.16Hide Answer Show Answer

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## Comments

That too me a while. I had to end up doing to prime factorization of the numbers. Still good though.

you ruined my appetite with the names of these "provisions".

what a teaser.

I don't get this?

OK. I found the answer, but I had to set up a spreadsheet to crunch all the possible combinations. I guess I do not understand the low difficulty rating. Is there something that I am missing that would make this teaser easier to solve? In other words, is there some method other than trial and error?

cnmne: I have the same question. If anyone knows a method to solve this please help!!

I think this teaser have an infinite possible solutions. It involves 4 variables with only 2 equations.

The only problem would be to find the possible combinations where all amounts are only up to 2 decimal places.

The only problem would be to find the possible combinations where all amounts are only up to 2 decimal places.

what if the cost is $10.71

and there are 7 items?

and there are 7 items?

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