Number of the day

In number of the day we have to answer these questions. I worked on this for more than one hour but it was worth it. I got them all correct. What I learnt was

1- four hundred and forty-one

2-431

3-456

4-549

5-400

6-odd

7-441,449,458,457.

8-441,1,3,7,9,21,49,63,147

9-yes

10-44.1