Ask a Question
Question Asked by a Student from EXXAMM.com Team
Q 1648891703.     Let `S` be a set of first fourteen natural nurnbers.
The possible number of pairs `(a, b)`, where `a, b,in S`
and `a ne b` such that `ab` leaves remainder `1` when
divided by `15`, is
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)