I do not get it but i sort of do
150 divided by 20 is 7 with a remainder of 10 The quotient is 7, but the answer is 8 I'm not sure if this is what you were looking for but I hope it helped
For question 2:150÷20=7.5 (That doesn't work for the number of boxes)20×7=140 so that means that they need 8 boxes because only 20 books can fit in each box and 150-140=10 and so those 10 books need their own box so it's 7+1=8
