Choose incorrect if the sentence is punctuated incorrectly. Choose correct if it is punctuated correctly.

1: I ran into a door [see the bump on head]? Incorrect***

2: Several children(that is, five) came with chicken pox. Incorrect***

3:Several students-twenty in all-auditioned for the lead. Correct***

Are these correct?

If #3 shows up like this in your text, then it's correct, yes.

3: Several students -- twenty in all -- auditioned for the lead.

There's a big difference between how hyphens (-) are used and how dashes (--) are used. https://www.ef.edu/english-resources/english-grammar/hyphens-and-dashes/

#1 is definitely incorrect, as you have chosen.
#2 could be correct if there were a space between "children" and the opening parenthesis. However, I believe dashes would be better used there than parentheses. I agree with you that this is incorrect, but be sure to double-check your text and this: http://www.thepunctuationguide.com/em-dash.html

Thank you, for your help!

Which one of the following sentences is punctuated incorrectly?

One of my favorite songs is "Here Comes the Sun" by the Beatles.

Dr. Seuss's book "The Cat in the Hat" is still popular with many children.

Lemony Snicket wrote the book The Bad Beginnings.

I just subscribed to Vogue magazine

Public service ads often urge people to be more careful or more responsible.

1: I ran into a door [see the bump on head]? Incorrect

2: Several children(that is, five) came with chicken pox. Incorrect

3: Several students-twenty in all-auditioned for the lead. Correct

Hehe! You got it right! The first two sentences have incorrect punctuation. But don't worry, nobody's perfect when it comes to punctuation. Keep up the good work!

1: I ran into a door [see the bump on head]? Incorrect

To determine if the sentence is punctuated correctly, we need to check the use of punctuation marks. In this case, the use of square brackets to enclose "see the bump on head" is incorrect. Square brackets are typically used to provide additional information or editorial comments within a quote or citation. However, in this context, parentheses or em dashes would be more appropriate.

2: Several children (that is, five) came with chicken pox. Incorrect

Again, to determine if the sentence is punctuated correctly, we need to check the use of punctuation marks. In this case, the comma between "children" and "that is, five" is incorrect. When providing clarification or additional information within a sentence, parentheses or em dashes are typically used, not commas.

3: Several students - twenty in all - auditioned for the lead. Correct

To determine if the sentence is punctuated correctly, we need to check the use of punctuation marks. In this case, the use of em dashes to set off the phrase "twenty in all" is correct. Em dashes are commonly used to indicate interruption or emphasis, or, as in this case, to provide additional information.