Question 1093358
<br>Instead of the ugly algebra in the first response you got, and without having to find the square root of 7140 as in the second response, try doing some estimating and logical reasoning.<br>
80*80= 6400; 90*90 = 8100.<br>
So the two page numbers must be  between 80 and 90.<br>
The product of the two page numbers must is 7140, which ends in "0", so one of the two page numbers must be 85.<br>
Then you can either try the two possible answers of 84 and 85, or 85 and 86; or you can notice that 7140 is quite a bit closer to 6400 than it is to 8100, so the more likely answer is 84 and 85.<br>
And trying that works....