what is the name of book and who published the book?

Step-by-step explanation:

1. D

(addition)

2. D

(refer to the attached photo where I have shown the line)

3. A

( 16 / 24 = 8/12 = 4 / 6 = 2 / 3 )

4. B

(the upper number must the smaller than lower number)

5. A

(

Simple interest = (Principal × Rate × Time)/100

= 54000 x 6 x 1 / 100

= 540 x 6

= 3240

)

6. B

(to make it 40% 4 parts in total must be shaded but 1 part is already shaded so only 3 more)