Singular - Plural

Make Plural: (Questions:)
1.  geese (plural of goose)
2.  children (plural of child)

3.  bacterium (singular of bacteria)

4.  deer (singular-plural same)
5.  Pants are (always plural)

6.  Mathematics (always singular)

-:Find correct:-

7.  means is/are (singular-plural same)
8.  data are (plural of datum)

9.  teeth are (plural of tooth)
10. cattle are (always plural)