Five friends Andy, Brad, Cole, Dan and Enoch went to a supermarket and bought five sets of mobile phones.

• Each of the five friends took precisely one set. However, they chose to use mobile service networks of four service providers P, Q, R or S.
• Mobile phone sets of each person had a unique facility. These facilities were: 4k colour display, Group SMSing, Graphics and Screen savers.

It is known that:

1. Amongst, Andy, Brad, Cole, Dan and Enoch two were enjoying services of network P and two were enjoying 4k colour display facilities.
2. The one who was enjoying "group SMSing" facility in his mobile phone set, was also enjoying the Q network.
3. Neither of the two who were enjoying network P were Andy or Cole. Nor were they enjoying "4k colour display" facility in their mobile phone sets.
4. Brad who was not using the network S, was enjoying "4k colour display" facility in his mobile phone set.
5. Neither Andy nor Enoch was enjoying "4k colour display" facility or “graphics” facility.

From the above clues, determine which friend used which network and what was the facility provided in his mobile phone set.

Perhaps Charlie will run a simulation to confirm or correct this, but it seems to me that there is not a single unique solution.  It's possible that I'm misinterpreting part of the puzzle, though - I found some of the clues to be a little ambiguously worded.  For example:

"Neither of the two who were enjoying network P were Andy or Cole. Nor were they enjoying "4k colour display" facility in their mobile phone sets."

Who is "they?"  Does this mean that Andy and Cole are not using the 4k display?  Or does this mean that the two people using network P are not using the 4k display?  I think it follows directly from other clues that it must be the former interpretation, but it left me a little uneasy, and because I didn't find a unique solution it leaves me wondering if I've misinterpreted something.  Anyway, I think any of these solutions works:

 

Andy: Q, SMS; Brad: P, 4K; Cole: R, Grpahics; Dan: P, 4K; Enoch: S, Screen Savers

Andy: Q, SMS; Brad: P, 4K; Cole: R, Grpahics; Dan: S, 4K; Enoch: P, Screen Savers

Andy: Q, SMS; Brad: P, 4K; Cole: S, Grpahics; Dan: P, 4K; Enoch: R, Screen Savers

Andy: Q, SMS; Brad: P, 4K; Cole: S, Grpahics; Dan: R, 4K; Enoch: P, Screen Savers

Andy: Q, SMS; Brad: R, 4K; Cole: S, Grpahics; Dan: P, 4K; Enoch: P, Screen Savers

Andy: R, Screen Savers; Brad: P, 4K; Cole: S, Grpahics; Dan: P, 4K; Enoch: Q, SMS

Andy: S, Screen Savers; Brad: P, 4K; Cole: R, Grpahics; Dan: P, 4K; Enoch: Q, SMS

 

Posted by tomarken on 2014-05-05 13:13:39