‘Sholay Coin’ Puzzle


You
 have
 8 
Sholay coins 
which 
are 
all 
the 
same 
weight,
 except 
for 
one 
which 
is 
slightly
 heavier 
than 
the 
others
(you 
don’t 
know 
which 
coin 
is 
heavier).

You
also 
have 
an
 old‐style 
balance,
 which 
allows 
you 
to 
weigh
 two 
piles 
of
 coins 
to 
see 
which 
one 
is
 heavier
(or 
if 
they 
are 
of 
equal 
weight).

What 
is 
the
fewest 
number 
of 
weighings
 that 
you 
can 
make 
which 
will 
tell 
you 
which 
coin 
is 
the 
heavier 
one?


10 Responses to ‘Sholay Coin’ Puzzle

  1. Navaneethakrishnan says:

    3rd time , we’ll get the heavier coin . is it rgt ???

  2. shanth kumar N says:

    7

  3. Twice. Put 3/3 each coin on each balance.
    Condition-1: if the coins placed on the weighing pan are equal, then the heavier coin lies in the remaining two, weight the two, you’ll get the answer.
    Condition-2: If one side of the pan containing 3 coins is slightly heavier, then remove the 3 coins and put 2 on the pans. If both show equal balance, the remaining coin is the heavier one, or the one heavier will show deflection during weighing.

  4. thanks a lot.!! I am looking forward, for the upcoming questions!

  5. israar shaikh says:

    f the coins placed on the weighing pan are equal, then the heavier coin lies in the remaining two, weight the two, you’ll get the answer.
    ”it is similar 2 the 8 marble puzzle”

  6. israar shaikh says:

    in 2 steps
    as explained in the 2nd comment

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