Hello.
Okay, we know that Damien has 308 cards
We also know that Paul has 145 fewer cards than Damien.
So,
308 - 145 = 163
So Paul has 163 cards
Nasir has 93 more than Paul so:
163 + 93 = 256
Nasir has 256 cards given these numbers.
Either the answers are wrong or the question is wrong