self Maths Puzzle

there are 8 equilant balls.but 1 of them is different(more) weight than other.how can u find the differ ball by weighing two balances only..?

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self Other Question

A & B THROW A DICE ALTERNATIVELY TILL ONE OF THEM GETS A '6' AND WINS THE GAME. WHAT WILL BE THEIR RESPECTIVE PROBABILITIES? find the number of 5 digits numbers can be formed using the digits 1,2,3,4,5 if no digit is reapeted and two adjoint digits are not together