Question

The left and right page numbers of an open book are two consecutive integers whose sum is 209. Find these page numbers.

Answer 1

Let $x$ be the first page

2nd page =$x+1$

Thus ;

$x+x+1=209$

$2x+1=209$

$2x=208$

$x$ $=104$

$x+1=105$

Thus the pages are 104 and 105