Question 4 = Option A
Since the volume is given as 630 inch^3, you need to work out the dimensions by multiplying and check which option gives you the answer 630.
Only 7 x 9 x 10 gives you the answer 630.
Question 5 = Option B
6 cups are being divided into 8 friends.
6 divided by 8 comes out to be 3/4.