Help Pls

11 Plus Maths – Preparation and Information

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indian-mum
Posts: 50
Joined: Fri Jul 11, 2014 1:34 pm

Help Pls

Post by indian-mum »

On a game show, there are 3 doors.
Behind one door, there is £1000 and behind another, there is a spider!
Behind the other door there is nothing.
Each door has a notice. However, only one notice is true.

Door 1 : There is nothing behind Door3

Door 2 : The spider is behind this door

Door 3 : There is a spider behind Door 1


Behind Which door is £1000???
Guest55
Posts: 16254
Joined: Mon Feb 12, 2007 2:21 pm

Re: Help Pls

Post by Guest55 »

Think in turn about what would be implied:

Statement one was true ... there WAS nothing behind door 3 ... what does this say about the other two statements? Can they both be false?

Then repeat.
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