Don't just correct the sentence, name each error.......... And I assure you there are 3 errors..... ..........Youre all going to hate me when I tell you the third.
The first two errors are 'There' and 'errors' but the third error is that it is a paradox!
If the third error is that there are only two errors then the sentance should be 'There are two errors in this puzzle - what are they?' but that would make the 'two errors' a error(because there were actually three including the 'there are actually only two errors') making the last error a paradox!