Thanks so much for this comment! This fix has been made now. 🙂
The number was 59303451, but the screen showed 59505450.
In the first mini question, there are only 4 options to select and you can only select one even though the video says "select all that apply".
125/2 rounded down is 62
@angeliccanary Great catch! I've passed it on 🙂
Then gcd(a, b)=2 and gcd(a, 2b)=4!!!