Meanings of number 1000 in inglés

Number 1000 had a perfect habit at the end of four weeks of disuse; No.

Number 1000 learned to discriminate white from black more quickly and retained his habit longer than any other dancer with which I have experimented.

Number 1000, to be sure, was led into three erroneous choices by the brightness check series (series 7), but, on the other hand, No.