progressive increment of 25%
Sun, 2010-05-09 18:37
The publisher of a novel, publishes the novel in six volumes numbered I,II,III,IV,V,VI. The number of pages in each volume is 25% more than that in the previous volume. If the number of pages in volume V of the book is 500 more than the pages in volume IV, how many pages were there in volume II of the book?
1. 480
2.960
3.640
4.1024
5.1280
answer: 5. 1280
How do we do this ques??
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Hi, Solution to this problem can be found very easily,
Let 1st issue have x pages.
Then 2nd issue will have 1.25x pages, 3rd will have (1.25)2x pages, 4th will have (1.25)3x pages.
Similarly, 5th edition will have (1.25)4x pages
Find Difference between (1.25)4x and (1.25)3x and equate to 500 to get value of x.
then for getting pages in 2nd edition, we have to find the value of 1.25x
Although, its the simplest method, yet long. If anyone can tell me a simple way out, it would be appreciated.
Thanks :)