If he has 16 Crackers to share equal with his mother. i Am Pretty sure you have to subtract it depends on How much crackers his Mother Wants so Let's say... His mother want 4 crackers. and he has 16 crackers so he will have 12 Crackers left if i'm Wrong i am Sorry.
Idk the first one but 2nd one is (c)Nia pulled a pencil from a drawer without looking... and the last one is (d) brandon and jordan roll a number cube....