Coins problem

1. 8(Eight) Coins Problems :

Given 8 coins and a weighing balance (wherein weights of two objects can be compared by placing them in two different weighing pans). All coins except 1 weigh same. The exceptional coin weighs more than the others. Find that coin, in minimum number of weighs.

Given 8 coins and a weighing balance (wherein weights of two objects can be compared by placing them in two different weighing pans). All coins except 1 weigh same. The exceptional coin may weigh more or less than other coins. Find that coin and also whether it weighs more/less, in minimum number of weighs.

2. 12(Twelve) Coins Problem :

Given 12 coins and a weighing balance (wherein weights of two objects can be compared by placing them in two different weighing pans). All coins except 1 weigh same. The exceptional coin may weigh more or less than other coins. Find that coin and also whether it weighs more/less, in minimum number of weighs.

3. 'n' Coins Problem (Numeric Equation) :

Given 'n' number of coins and a weighing balance (wherein weights of two objects can be compared by placing them in two different weighing pans). All coins except 1 weigh same. The exceptional coin weighs more than the others. Find how many weighs, 'x', are required to find the exceptional coin. Device a numeric equation in 'n' and 'x'.

Given 'n' number of coins and a weighing balance (wherein weights of two objects can be compared by placing them in two different weighing pans). All coins except 1 weigh same. The exceptional coin may weigh more or less than the others. Find how many weighs, 'x', are required to find the exceptional coin and whether it weighs more/less. Device a numeric equation in  'n' and 'x'.