2000 PMWC Problems/Problem I12
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Problem
During the rest hour, one of five students (,
,
,
, and
) dropped a glass of water. The following are the responses of the children when the teacher questioned them:
: It was
or
who dropped it.
: Neither
nor I did it.
: Both
and
are lying.
: Only one of
or
is telling the truth.
:
is not speaking the truth.
The class teacher knows that three of them NEVER lie while the other two ALWAYS lie. Who dropped the glass?