Can someone me on 3 and 5 and check the others

3) 1 quart = 4 cups
6 quarts =6*4 = 24 cups
30 cups >24 cups (6 quarts)
30-24= 6 cups more 
6 cups more in 30 cups than in 6 quarts.
 
5) 1 quart = 4 cups
36 quarts = 4*36=144 cups holds Sally's can.
64+144=208 cups hold both cans.

All other problems are correct.