Failed 1st assignment

I submitted my first assignment few days ago and a got results saying that i failed the first question
feed back was
“Variable age needs to be a number”
i looked back on it to see that it was in fact a number (22)
and re submitted it twice and have have the same results?

can someone help.

link to my assignment is below

It’s not a number, it’s a text, containing two characters: 2 and 2.

Can you get rid of the round brackets around age in the second line?