How do i solve the square root of all these problems step by step

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Which of the greatest common gcf of 32 and 48 a 16 b 96 c 8 d 32

What is the length of the unknown leg in the right triangle ?