Cathy read
12 of the manual. If she had read another 25 pages, she would have read
67 of the whole manual altogether. How many pages were there in the manual?
|
Read |
Not read |
Total |
Before |
1x7 = 7 u |
1x7 = 7 u |
2x7 = 14 u |
Change |
+ 25 |
- 25 |
|
After |
6x2 = 12 u |
1x2 = 2 u |
7x2 = 14 u |
The total number of pages remains unchanged. Make the total number of pages the same. LCM of 2 and 7 is 14.
Number of additional pages that Cathy would have read
= 12 u - 7 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Number of pages in the manual
= 14 u
= 14 x 5
= 70
Answer(s): 70