Question

1. I have seven balls. One is white, another is black, a third is blue, a fourth is green, a fifth is brown, a sixth is pink, and the other is orange.
(Is this sentence grammatical and commonly used?

2. I have two balls: One is green and the other is yellow.

3. I have two balls: one is green and the other is yellow.
(Do we have to use a small letter 'o,' or do we have to use the capital letter 'O'?)

4. I have two balls; one is green and the other is yellow.
(When a semi-colon is used, we have to use 'one.' Am I right?

Answer 1

For 1, I'd just list the colors, not "one is" etc.

2 is correct.

3 is incorrect; see your other post.

4 is incorrect; see your other post and this webpage about using semicolons: http://grammar.ccc.commnet.edu/grammar/marks/semicolon.htm