A logic problem by Mohammad Syed

Logic Level 1

There are three friends A, B and C. One of them always lies

A: You guys owe me $10 each

B: I don't owe you $10

C: I owe you nothing

Which one is lying?

B No one is lying A C

Mohammad Syed by Mohammad Syed , 23, Pakistan

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2 solutions

Kenny O.
Sep 14, 2017

If either B or C is lying, A would also be lying as only 1 of them owe $10 (or any amount for C).
This means only A is lying.

0 Helpful 1 Interesting 0 Brilliant 0 Confused

so, only one of them are lying and the others are telling the truth.If B was lying, then C would be lying too, and if C was lying, then B would be lying, so it is A.

1 Helpful 0 Interesting 0 Brilliant 0 Confused

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