A always says Truth, B always lies, C sometimes lies and D is deaf & dumb. Max questions need to ask to determine ABCD?

1 Answer (Check Answer ▼)

Ask a question who sometimes lie you will get the answer as A point to C , B point (A ,C, D),C point (A,B,C,D),D is deaf and dumb
So ask only one questions.

answer Jul 20, 2017 by anonymous

But how from the above question we can decide who is A, B, C & D. Remember you dont know who is A, B, C and D.

commented Jul 20, 2017 by Salil Agrawal

A would say 'Truth' to everything, so ask them if they are A.
B if asked if they were A would lie and say yes, showing they are not.
C ask them the same question, are they A? if they say yes ask again and if they say no they're C.
D just won't hear you so won't be able to answer.
So if you can address them all, it should be at a minimum of 2, as C and B would need to be asked individually.

commented May 10, 2019 by anonymous

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