Yoko read
25 of the book. If she had read another 160 pages, she would have read
67 of the whole book altogether. How many pages were there in the book?
|
Read |
Not read |
Total |
Before |
2x7 = 14 u |
3x7 = 21 u |
5x7 = 35 u |
Change |
+ 160 |
- 160 |
|
After |
6x5 = 30 u |
1x5 = 5 u |
7x5 = 35 u |
The total number of pages remains unchanged. Make the total number of pages the same. LCM of 5 and 7 is 35.
Number of additional pages that Yoko would have read
= 30 u - 14 u
= 16 u
16 u = 160
1 u = 160 ÷ 16 = 10
Number of pages in the book
= 35 u
= 35 x 10
= 350
Answer(s): 350