Maths is Fun: Maths Puzzles With Answers #38

Friday, 7 September 2018

Maths Puzzles With Answers #38

Maths Puzzles With Answers #38

Solution:-

Let

x

be the total number of pages in the book, then she finished

\frac{2}{3} \cdot x

pages.

Then she has

x - \frac{2}{3} \cdot x = \frac{1}{3} \cdot x

pages left.

\frac{2}{3} \cdot x - \frac{1}{3} \cdot x = 90

x = 270

x = 270

x = 270

x = 270

x = 270

x = 270

x = 270

x = 270

So the book is 270 pages long.

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