Represent 6 with 3 identical digits using only the usual arithmetic operations, factorials and square roots

( 0! + 0! + 0! ) ! = 6

( 1 + 1 + 1 ) ! = 6

 2 + 2 + 2 = 6

 3 × 3 - 3 = 6

√ 4 + √ 4 + √ 4 = 6

 5 + 5 ÷ 5 = 6

 6 + 6 - 6 = 6

 7 - 7 ÷ 7 = 6

8-√√ 8 + 8 = 6

√ 9 × √ 9 - √ 9 = 6