I think it’s supposed to say “Cross out the digit necessary”, so one digit, in which case cross out the 1 because there’s enough 0’s that crossing out one 0 isn’t enough.
It’s 10 that has me confused. Is it asking for the last letter of the first word that starts with ‘L’ in that sentence? It doesn’t actually specify.
That would be my guess too, but tbh that’s the only question I don’t feel confident about