To write the exponent for the expression 1/6 x 1/6 x 1/6, we can rewrite it using exponent notation. Each factor, 1/6, can be written as 6 raised to the power of -1.
So, the expression can be written as (6^-1) x (6^-1) x (6^-1).
To simplify this expression, we can add the exponents since we are multiplying the same base:
6^-1 x 6^-1 x 6^-1 = 6^(-1 + -1 + -1)
Adding the exponents:
6^-1 x 6^-1 x 6^-1 = 6^(-3)
Therefore, the exponent for the expression 1/6 x 1/6 x 1/6 is -3.